-5 + 12x = 18x + 7
Subtract 7 from each side:
-12 + 12x = 18x
Subtract 12x from each side:
-12 = 6x
Divide each side by 6:
-2 = x
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x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
x=5
30+12x = 6(5+2x)
8x-3+6x-1 = 12x+614x-4 = 12x+614x-12x = 6+42x = 10x = 5
2x+5=-91-10x 12x+5=-91 12x=-96 x=-8