i know this is easy, but i forgot how to do it, what is x , when 3xsquared = 12?
212590
3x^2 = 12\n\nFirst, divide by three.\n\nx^2 = 4\n\nTake the square root.\n\nx = +2, -2
575283
(x - 2)*3 = 6 + x\n\n3x - 6 = 6 + x\n\n2x = 12\n\nx = 6
382909
sqrt(3x + 4) + x = 8\nsqrt(3x + 4) = 8 - x\n3x + 4 = 64 - 16x + x^2\n0 = x^2 - 19x + 60\n(x - 15)(x - 4) = 0\nx = 4 or 15\n\nSubstitute x=4 into the original equation and it works.\nSubstitute x=15 into the original equation and it doesn't. It is extraneous.
178578
multiply the numerators (numbers on top) to get a final numerator..then multiply the denominator (numbers on the bottom) to get the final denominator...then simplify if/when nesscessary\n\ntherefore\n-4      X     -3    =       12    =      3\n 5             8            40          10
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
647368
I hope you are trying to say x+2 = (2/3)(2x-1)..if it is correct then\n\n3(x+2) = 2(2x-1) --> 3x+6 = 4x - 2 --> 6+2 = 4x-3x --> 8 = x
508471
First, factor out 3x from the equation, so 0= 3x(x^2-2x-3).\n\nThen, factor the polynomial in the parenthesis, so 0= 3x(x-3)(x+1)\n\nAfter that, use the zero product property to set each part of the the equation to zero, so 0=3x, 0=x-3, and 0=x+1.\n\nSolve these three to get x=0, x=3, and x=-1, respectively.
365168
x=x is the simplest...\n\nMake up any expression, simplify it a little bit, and set them equal.
403554
-x<=3-y<=x\nso u have\n-x<=3-y\n3-y<=x\nor\ny-x<=3\ny+x>=3\n\nx=y cannot be simplified further
460869
1) 4-3x<_8+x\n4+8<_x+3x\n12<_4x\n3<_x or x in the interval [3,plus infinity)\n\n2) 3x-3>-x+1\n3x+x>1+3\n4x>4\nx>1 or x in the interval (1, plus infinity)\n\n3) 3(x-1)_<4x\n3x-3<_4x\n-3<_x or x in the interval [-3, plus infinity)\n\n4)1/2x<x+1\n-1<x/2\n-2<x or x in the interval (-2, plus infinity)\n\n5)-1/2x>1-x\nx/2>1\nx>2 or x in the interval (2, plus infinity)
629794
-4(3-x) = 2(x+6) \n-12+4X=2X+12 use distributive property\n-12+4x-2x=2x-2x+12 move the variable x onto 1 side \n-12+12+2x=12+12 isolate the variable x\n2x=24\n(2x/2)=24/2\nx=12\n\nCheater!
514107
-4(x+3)>=20    &     x-5< -2\n-4x-12  >= 20    &     x < 5-2\n-4x  >=  20+12   &    x < 3\n-4x >=  32      &    x < 3\nx >= -8   &  x< 3\n-8  <=  x  <  3\n(x lies between -8 and 3)
93326
You've just got to do the cross-multiply trick.  Sooo...\n4(x-2)=24 -> 4x-8=24 -> 4x=32 -> x=8
401499
Answer 1:\n3(x + 1) = 24\n3x + 3 = 24\n3x + 3 - 3 = 24 - 3 (Subtract 3 from both sides)\n3x = 21\n3x/3 = 21/3 (Divide both sides by 3)\nx = 21/3\nx = 7\n\nAnswer 2:\n3(x + 2) = -9 - 2x\n3x + 6 = -9-2x\n3x + 2x + 6 = -9 - 2x + 2x (Add 2x to both sides)\n5x + 6 = -9\n5x + 6 - 6 = -9 - 6 (Subtract 6 from both sides)\n5x = -15\n5x/5 = -15/5 (Divivde both sides by 5)\nx = -15/5\nx = -3\n\nAnswer 3:\n3(x + 2) = 9 + 2(x+4)\n3x + 6 = 9 + 2x + 8\n3x + 6 = 2x + 17\n3x + 6 - 6 = 2x + 17 - 6 (Subtract 6 from both sides)\n3x = 2x + 11\n3x - 2x = 2x - 2x + 11 (Subract 2x from both sides)\nx = 11
487385
2x^2-8x+3x-12\n2x(x-4)+3(x-4)\n2x+3 = 0 or x-4= 0\nx = -3/2 or x = 4\n\n2x^2+10x-72\n2x^2+18x-8x-72\n2x(x+9)-8(x+9)\nx = 4 or x = -9\n\nx^2+6x-x-6\nx-1 = 0 or x+6 = 0\nx = 1 or x = -6
603762
x-3=3\nx=3+3\nx=6\n\n\n15-(x)=7\n15-7=x\n8=x
488984
8-3x=4x-12+6\n-7x=-14\nx=2