12=-4(1+3x)-8(x+3)

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Solution for 12=-4(1+3x)-8(x+3) equation:


12=-4(1+3x)-8(x+3)

We simplify the equation to the form, which is simple to understand 
12=-4(1+3x)-8(x+3)

Reorder the terms in parentheses
12=+(-4-12x)-8*(x+3)

Remove unnecessary parentheses
+12=-4-12x-8+*(+x+3+)

Reorder the terms in parentheses
12=-4-12x+(-8x-24)

Remove unnecessary parentheses
+12=-4-12x-8x-24

We move all terms containing x to the left and all other terms to the right. 
+12x+8x=-4-24-12

We simplify left and right side of the equation. 
+20x=-40

We divide both sides of the equation by 20 to get x. 
x=-2

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