solve the system. x - 5y = 10, -3x + 15y = -30?
918448
-3x+15y=-30\n\nWe'll divide everything by 3 to make it easier\n\n-x+5y=-10\n\nWe have x - 5y = 10\n\nIf we multiply that equation by -1, we get\n-x+5y=-10!\n\nThis is the same as the simplified -3x+15y=-30, which means that any x and its corresponding y value fits both equations.\n\nIf they are the same equation, then all values of x (and the necessary values of y) will work; the solution is all numbers x.\n\nHope this helps.
846702
-x + 2y = 18\n x + 8y = -38\n\nadd up these two lines\n\n0x+ 10y = -20\ny= -20/10 = -2\n\nx + 8(-2) = -38\nx - 16 = -38\n\n\nx=-22\ny=-2
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
823703
-30x^3y^5=2xy(-15x^2y^4)\n16x^3y=2xy(8x^2)\n-10xy^3=2(-5xy^2)\nso the expression\n2xy(-15x^2y^4+8x^2-5xy^2)/-4xy^3\n=-(1/2y^2)[-15x^2y^4+8x^2-5xy^2]
801041
Notice x = -3 + 3y (based on your second equation), so substitute this for x into your first equation to solve for y:\n\n-2x + 7y = 10\n\n-2(-3 + 3y) + 7y = 10\n\n6 - 6y + 7y = 10\n\n6 + y = 10\n\ny = 4\n\nNow plug this into the other equation to solve for x:\n\nx = -3 + 3y\n\nx = -3 + 3(4)\n\nx = -3 + 12\n\nx = 9\n\nANSWER:  x=9, y=4\n\nNRT
96194
Yes you are on the right track...Sort of.  \n\nSay you plug in any number for x.  We'll use 5\n\n-3(5)+y=-15\n-15+y=-15\n\nNow add 15 from the left to cancel the negative 15.  Then add 15 to the right to make the equation:\n\ny=0\n\nSo if x=5 and y=0 then your points will be (5,0)\n\nSay you have your original equation again\n-3x+y=-15\n\nNow plugin for x any number.  We'll use 1.\n\n-3(1)+y=-15\n-3+y=-15\n\nNow add 3 to the left to cancel out the negative 3 and add 3 to the right to make:\n\ny=-12\n\nSo x=1 and y=-12   (1,-12)\n\nHope that helps
1052500
Yes\nCheck:\n10 - 3(-5) = 25\n10 + 15 = 25\n25 = 25
935657
5x = -15          x = -3\n-4x = 36          x = -9\n12+n/2=18      n = 12\n-25 = 5 - 6x     x = 5\n2x + 3x = -45  x =-9\n7n--n=48        x = 8
516161
x-y+3x-5y+3=0\n\n4x - 6y + 3 = 0\n\n4x + 3 = 6y\n\n2x/3 + 1/2 = y
159612
Multiple the first equation by two\n-10x-8y = -22\n10x +y = -6  (second equation)\n\neliminate x\n\n-7y = -28\ny = 4\n\n10x + 4 = -6\n10x = -10\nx = -1
795807
15x^2 + 28x + 5 = 0\n\n(5x + 1)(3x + 5) = 0\n\n5x + 1 = 0                        \n5x = -1                             \nx = -1/5         \n\n3x + 5 = 0\n3x = -5\nx = -5/3
807209
I can tell you just by looking at this that it won't work, but here's the process:\nMultiply the first equation by 2 so the x coefficient in the first equation is the opposite (negative) of the x coefficient in the second equation:\n2x + 10y = 20\nMove the y and the constant in the second equation to make it match the formet of the first\n-2x -10y = -20\nAdd the two equations to get:\n2x + 10y = 20\n+(-2x -10y = -20)\n----------------------\n0 = 0\n\nThere is no single solution, because the two equations are actually the same equation written differently.
894390
2sin3x*[-15sin3x]\n=-30*sin^23x
973910
17.\n5x+7y=-1  (1)\n-2y+3z=9  (2)\n7x-z=27    (3)\n(3)*3\n21x-3z=81\n-2y+3z=9\nadding\n21x-2y=90 *7\n147x-14y=630\n10x+14y=-2\n157x=628\nx=4\nsub in (1)\ny=-3\nsubin (2)\nz=1\n\n\n18.\nr-s+3t=-8    (1)     \n2s-t=15       (2)\n3r+2t=-7      (3)\n\n(2)*2  4s-2t=30\n          3r+2t=-7\nadding\n4s+3r=23\n(2)*3  6s-3t=45\n       r-s-3t=-8\nadding\n5s+r=37\n4s+3r=23\n15s+3r=111\nsubtracting\n11s=88\ns=8\nsub in (2)\n16-t=15\nt=1\nsub in (3)\n3r+2=-7\nr=-3
549969
x=-y-9\n3(-y-9)-y=-7\n-3y-27-y=-7\n-4y-27=-7\n-4y=-20\ny=5\nx+5=-9\nx=-14
930601
put -2y=5-3x call it equation {1}\ncall 4x-5y=86 {2}\n\nmultiply all of the terms i {1} by 5\nmultiply all ot the terms in {2) by 2\nthis gives -10y=25-15x {3} &  8x-10y=172 {4}\nyou've got -10y in terms of x in {3}, so just put that into {4}  8x+25-15x=172, -7x=157, \nx = -172/7 sub in to {1} to get y \nman that was ablast from the past, haven't done that for years.
631059
3y+5=y-25\n2y+5=-25\n2y=-30\ny=-15\n\nSee, you just use inverse operations.\n\n4n-5=2n+3\n2n-5=3\n2n=8\nn=4\n\nSo your answers are y=-15 and n=4. I hope that helped!