can you help me with a math problem that i dont understand its 4x-7=2x+15?
484284
4x-7=2x+15\n4x-2x=15+7\n2x=22\nx=11\n\nto check your work\n4(11)-7=2(11)+15\n44-7=22+15\n37=37
822098
2x - 7 = -4x - 1\n\nFirst, add 4x to both sides\n\n2x + 4x -7 = -1\n\nAdd like terms\n\n6x -7 = -1\n\nAdd 7 to both sides\n\n6x = 6\n\nDivide both sides by 6\n\nx = 1
843360
get the x's on one side and the numbers on the other.\n\nto do that -- perform the opposite operation to each part you want to move on BOTH sides of the equation ..\n\n3x + 3 = 15 - x\n3x (+ x) +3 = 15 - x (+ x)  ---- adding x to both sides\n4x + 3 = 15\n4x + 3 (- 3) = 15 (- 3) ---- subtract 3 from both sides\n4x = 12\n\nI'll bet you can do the last operation in your head ... just divide by 4 and you have your answer to x!
296060
5x-2y=7\n3x+4y=2\n\n5x-2y=7 (multiply this by 3)\n3x+4y=2 (multiply this by 5)\n\n15x-6y=21  (now subtract the bottom from\n15x+20y=10  the top)\n\n-26y-11 (y=.42 then substitute y in the problem)\n\n15x -6*.42=21 (then solve from there)
734008
that means you multiply by the 2 first,  2 x X and 2 x 7\nso then you have  2x + 14= - 26      move your 14 to the other side by adding its opposite to both sides\n2x + 14 = - 26\n2x +14   +  - 14  = -26   +    -14\n\n2x =  -40\nthen divide both sides by 2\n2x/2    = -40/2\nx= -20
884586
(3x+5)(2x-3) = 6x^2 +x -15\n\n(x-1)(6x+5) = 6x^2-x-5\n\ntherefore you have \n\n6x^2+x-15 = 6x^2 -x -5\n\nsubtract 6x^2-x from both sides and you get\n\n2x-15 = -5\n\nadd 15 to both sides and you get\n\n2x = 10\ndivide both sides by 2\n\nx = 5
1153869
Well, if the perimeter (thats all the way around the outside or all three sides together is 35, then you can add up the three sides and they should equal 35\n\n3x-5 + 2x-3 + 15-x = 35\n\na little algerbracadabra :  3x+2x-x-5-3+15=35\n\nthen  4x=28\nand x=7\n\nso , put 7 back in for x for each of the sides and you get\n3(7)-5=16\n2(7)-3=11\n15-(7)=8\n\ndouble check just to be sure 16+11+8=35\n\nhurrah \nkeep at it\nmath is power
829898
Once again, you do the same thing for the 3x – 7 = 2x + 8 question. \n\n. 4(7x + 10) = 3(9x – 5) + 20\nLook above. Decimal. This fun. \n\n1. Use Distribution Property \n\n.4(7x)+.4(10) = 3(9x) -3(5) +20\n\n2. Simplify\n2.8x+4=27x-15+20 \n\n3. Simplify again. \n2.8x+4=27x+5\n\n4. Now we move everything as accordimg to Equality Property.(refer to 3x-7=2x+8 problem)\n\n2.8x+4-4=27x+5-4\n\n5. Now do the same with x. \n\n2.8x-27x=1+27x-27x\n\n6. Simplify\n\n-24.2x=1 \n\n7. This is going to be negative. Now divide\n\nx=-1/24.2\n\nYou cant go any farther so, the answer is:\n\n-1/24.2\nIf you were to divide it for some unknown reason and to get a very stupid endless answer... It would be: \n-0.0413223140495866776859504132231405  \nThis is as easy as pi ( and no i did not mean "pie"). It goes and on and on. So stick with -1/24.2. \n\nHope this helps~!\n\nNeed anymore help? Email me your questions at jacquelafayette@yahoo.com
1056150
7 - [2(3x + 4) - 5] = x - 3\n7 - [6x + 8 - 5] = x - 3\n7 - [6x + 3] = x - 3\n7 - 6x - 3 = x - 3\n4 - 6x = x - 3\n4 - 7x = -3\n-7x = -7\nx = 1\nCheck:\n7 - [2(3*1 + 4) - 5] = 1 - 3\n7 - [(2(3+4) - 5] = -2\n7 - [2(7)-5] = -2\n7 - [14-5] = -2\n7 - 9 = -2\n-2 = -2
863984
4x-3+2x=15\n4x+2x-3=15\n4x+2x=15+3\n6x=18\nx=18:6\nx=3\n\n4*3-3+2*3=15\n12-3+6=15\n9+6=15\n15=15 ...so x=3
993371
2x-6-3x+15=21*(x-2)\n-x+9=21x-42\n51=22x\nx=51/22, but I don't think you meant multiply by 7 at the end.
800297
15(-10) +4x = -x +10(-10)\n5 +4x(-4x)= -x+(-4x)\n5= -5x\nx= -1\n\n4(2x - 6) = x + 2\n8x (-x)- 24= x (-x) + 2\n7x - 24 (+24)= 2(+24)\n7x =26\nx = 3.7\n\n2(x+5) + 1 = 3 (x - 1) + 4\n2x+10 +1=3x-3+4\n2x+11=3x+1\n10=x\n\n- 3n + 12 + n = 22 \n-2n +12 = 22\n-2n= 10\nn= -5
940849
2x + 4y = -6\nX - 3y = 7 multiply by two\n\n2x + 4y = -6\n2x - 6y = 14\n{subtract equation 2 from equation 1}\n\n2x - 2x + 4y - (-6y) = -6 - 14\n10 y = -20 divide by 10\ny = -2\n\n\nplug into a equation \n2x - 6(-2)  = 14\n2x + 12 = 14\n2x = 2\nx = 1\n\nx = 1, y = 2
897641
8-3x=4x-12+6\n-7x=-14\nx=2
17048
= x^2 - 7x + 4x -28\n= x^2 - 3x - 28
705155
10 + 6x = 4x - 4\n2x = -14\nx = -7
758567
2(2x-4)= x+4\n4x-8 = x+4\n4x-x = 8+4\n3x = 12\nx=4\n\n&\n\n4(x+3)+3= 5(x-4) + 5\n4x+12+3 = 5x-20+5\n4x+15 = 5x-15\n4x-5x = -15-15\n-x= -30\nx = 30\n\n&\n\nx+2= 4(5x-2)\nx+2 = 20x-8\n2+8=20x-x\n10 = 19x\n19x= 10\nx=10/19\n\n&\n\n21-3x = 4x+7\n21-7 = 4x+3x\n14=7x\n7x = 14\nx=14/7\nx=2