The 'answer' is the number that 'x' has to be in order to make the statement true.
18x + 3 = 12x
Subtract 3 from each side of the equation:
18x = 12x - 3
Subtract 12x from each side:
6x = -3
Divide each side by 6 :
x = - 1/2
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12x = x + 3 11x = 3 x = 3/11
x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
8x-3+6x-1 = 12x+614x-4 = 12x+614x-12x = 6+42x = 10x = 5
12x - 8 = 10x + 42x = 12x = 6
As written, that's 3x^3 - 12x which factors to 3x(x - 2)(x + 2)