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simplify it, 7x-12=x+2+2x-3x 7x=2+12+3x-3x 7x=14 x=2
5x+7=3x-21 -7= -7 5x=3x-14 -3x=-3x 2x=-14 2x/2x=2x/-14 x=-7 The Answer Is -7 -
x+2x+14=5x+2 3x+14=5x+2 (add x's on same side)3x+12=5x (-2 from both side)12=2x (-3x from both sides)2x=12 (turn around for tidyness :P)x=6 (divide each side by 2 to get answer)
2x+12-3x = 5 2x-3x = 5-12 -x = -7 x = 7
If you mean: (3x-14)(2x+10) then it is the factored version of 6x^2 +2x -140