1) 2x-8=|26|\n\n2) 3x+5=|-20|\n\n3) 4x+12=32\n\n4) 8x+16=-32
198819
1. 17\nfirst you add 8 to both sides & u'll get 2x=34. Then you divide both sides by 2 & u'll get x=34/2 which is x=17.\n2. 5\nsubtract 5 from both sides (the bars enclosing 20 are the absolute vale bars which means that 20 "loses" the negative sign). u'll get 3x=15. then divide both sides by 3. so, x=15/3 which is 5.\n3. 5\nsubtract 12 from both sides. u'll get 4x=20. then divide both sides by 4. so x=20/4 which is x=5.\n4. -6\nsubtract 16 from both sides. u'll get 8x=-48. then divide both sides by 8 & u'll get x=-48/8 which is -6.\n\nhope this helps (& good luck)
460471
I'll do one for u.\nIn the first,\nMultiplying both sides by x*,we get\nx+3x+2x*=7x*\n4x+2x*=7x*\nMoving 4x and 2x* to the R.H.S.\n5x*-4x+0=0\nThus 5x*-4x=0\nAttempt the others in the same manner.
228519
1) y=x+4\n   3x+y=16 (I guess you made a mistake by writing +16)\n--------------\nsubstitute x+4 for y in second equation and you'll get\n\n   3x+x+4=16\n    4x+4=16\n    4x=12\n     x=3\n\nnow y=x+4=3+4=7\n\nsolution (x,y)=(3,7)\n\n2) 4x+5y=48\n    y=3x+2\n--------------\nsubstitute 3x+2 for y in first eq.\n\n4x+5(3x+2)=48\n\n4x+15x+10=48\n\n19x=38\n\nx=2\n\nnow y=3x+2=3*2+2=6+2=8\n\nsolution (x,y)=\n(2,8)\n\n3)3x-y=0\ny=6\nin first equation instead of y write 6\n\n3x-6=0\n3x=6\nx=2\n\nso, the solution is (2,6)\n\n4) x-2y=-10\n3x-y=0\n\nfrom the first equation you have\nx=2y-10\nnow substitute 2y-10 for x in second one\n\n3(2y-10)-y=0\n6y-30-y=0\n\n5y=30\ny=6 \nnow x=2y-10=2*6-10=12-10=2\nso x=2 and y=6
446734
1.\nn | n + 20\n------------\n0 | 20\n1 | 21\n2 | 22\n3 | 23\n4 | 24\n\nn | 3n - 35\n-------------\n1 | -32 \n2 | -29 \n3 | -26 \n4 | -23
563868
3x^2-4x-4\n=3x^2-6x+2x-4\n=[3x+2][x-2]\n\n16x^2+56x+49\n=[4x]^2+7^2+2*7*4x\n=[4x+7]^2\n\n6x^2+13x-5=0\n6x^2-15x+2x-5=0\n[3x+1][2x-5]=0\nx=[-1/3],[5/2]
413824
a)\n4x + 4y = -12\n-2x + 3y = 14\n\nDouble the second equation and add:\n4x + 4y = -12\n-4x + 6y = 28\n10y = 16\ny = 16/10\ny = 8/5\n\nThen solve for x:\nx + (8/5) = -3\nx = -3 - 8/5\nx = -4 3/5\n\nb) \n3x + 2y = 5\n2x - 3y = 3\n\nMultiply the top by 2 and the bottom by 3, then subtract:\n6x + 4y = 10\n6x - 9y = 9\n13y = 1\ny = 1/13\n\nThen solve for x:\n3x + 2(1/13) = 5\n3x + 2/13 = 5\n3x = 63/13\nx = 21/13\nx = 1 8/13
425161
#1 2x^4-18x^2=0\n=>2x^2(x^2-9)=0\n=>2x^2(x+3)(x-3)=0\nTherefore , x=-3 or +3 ans\n\n#x^3+1\n=(x+1)^3-3x(x+1)\n=(x+1){(x+1)^2-3x}\n=(x+1)(x^2+2x+1-3x)\n=(x+1)(x^2-x+1)\n#a) 6x^3-2x^2+9x-3\n=2x^2(3x-1)+3(3x-1)\n=(3x-1)(2x^2+3)\nb.8x^3-125\n=(2x)^3-(5)^3\n=(2x-5) {(2x)^2+2x*5+(5)^2}\n=(2x-5) (4x^2+10x+25)\nc.16x^4-9\n=(4x^2)^2-(3)^2\n=(4x^2+3)(4x^2-3)
465947
9x^2+18x+8=0\n\n(3x + 2)(3x + 4)=0\n3x+2=0\nx=-2/3\n3x+4=0\nx=-4/3
672926
10x – 4 – 5x = 6 + 3x – 8\n\n10x - 5x -3x = 6 - 8 +4\n\n2x = 2\n\nx =1
618607
3x + 4(3x+11)=-16 substitute 2 in 1\n3x + 12x +44 = -16\n15x= -16-44\nx=  -60/5\nx= -4\n\nx= -4 substitute in 2\ny= 3(-4)+11\ny= -12+11\ny= -1
339421
1.4x^2-3x-1=0\nx= (3+- sqrt(9-4(4)(-1) ) )/2(4)\nx=(3+- sqrt(25) )/8\nx=(3+- 5)/8\nx= (3+5)/8 =1 or x=(3- 5)/8 = -1/4\nthen \n4x^2-3x-1 = (x-1) (4x+1) =0\n\n2.(x^2-14)/(x-2)(x+2)+3/(x-2) =  4 / (x+2)\n [ (x^2-14)+3(x+2) ]/(x-2)(x+2)= 4 / (x+2)\nmultiply the equation by (x-2)(x+2) then we get:\n(x^2-14)+3(x+2) = 4(x-2)\nx^2 +3x -4x -14 +6 +8 =0\nx^2 -x =0\nx(x-1) =0\nso x =0 or x=1\n.
517117
(1)*4 +(2)\n-4x+16y=72\n4x+2y=0\n18y=72\ny=72/18=4\nsubstituting\n4x+2(4)=0\n4x=-8\nx=-2\nso x=-2 y=4
488146
4x-2x-6=8x-12\nadding 6\n2x=8x-6\nadding -8x\n-6x=-6\ndividing by -6\nx=1
248460
4(2X+6)=-8\n8X+24=-8\n8X=-36\nX=-4\n\nThere you are =)
376841
20 + x = -4x +15\n20 + x + 4x = -4x + 4x +15 (note I wanted to get x on the left of the = sign so I added 4x on both sides, if you only do it on one side, the equation will be unequal).\n20+ 5x = 15\n20- 20 + 5x = 15 - 20\n5x = -5\n5x/5 = -5/5\nx=-1\n\n5 = 5(x-1) + 3 - 4x\n5 = 5x -5 +3 -4x\n5= x - 2\n7 = x\n\n-5 +6 - 8x = -150\n1 - 8x = -150\n1 -1 - 8x = -150 -1 \n-8x = -150 -1 \n-8x = -151\n-8x/-8 = -151/-8\nx =151/8\n\nthe last one is similar to the first. just remember you need to solve for x and get x onto one side of the equation. Good luck!
46428
1. x=1.25\nSol'n.\n1/3x+1/2=11/12\n1/3x=11/12-1/2\n1/3x=5/12\nx=15/12\nx=1.25\n\n2. x=-3\nSol'n.\n1.5x+9=4.5\n1.5x=4.5-9\n1.5x=-4.5\nx=-3\n\n3. x=28\nSol'n.\n2(x+2)=3(x-8)\n2x+4=3x-24\n24+4=3x-2x\nx=28\n\n4. x=-12\nSol'n.\nx+5=-7\nx=-7-5\nx=-12\n\n5. x=-10.5\nSol'n.\n-4/7x=6\nx=-42/4\nx=-10.5\n\n6. x=261\nSol'n.\nx/3+2=89\nx/3=89-2\nx/3=87\nx=261\n\n7. a=3.5\nSol'n.\n3a+13=9a-8\n13+8=9a-3a\n21=6a\na=21/6\na=3.5\n\n8. n=0.8\nSol'n.\n15n+9=21\n15n=21-9\n15n=12\nn=12/15\nn=0.8\n\n9. x=-1\nSol'n.\n2(x+6)=-2(x+-4)\n2x+12=-2x+8\n2x+2x=8-12\n4x=-4\nx=-1\n\n10.x=0\nSol'n.\n-(x+2)-2x=-2(x+1)\n-x-2-2x=-2x-2\n-3x+2x=-2+2\n-x=0\nx=0
488984
8-3x=4x-12+6\n-7x=-14\nx=2