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4(2x+9)=-12+8
We move all terms to the left:
4(2x+9)-(-12+8)=0
We add all the numbers together, and all the variables
4(2x+9)-(-4)=0
We add all the numbers together, and all the variables
4(2x+9)+4=0
We multiply parentheses
8x+36+4=0
We add all the numbers together, and all the variables
8x+40=0
We move all terms containing x to the left, all other terms to the right
8x=-40
x=-40/8
x=-5
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