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8(x+7)+4(x+4)=-7
We move all terms to the left:
8(x+7)+4(x+4)-(-7)=0
We add all the numbers together, and all the variables
8(x+7)+4(x+4)+7=0
We multiply parentheses
8x+4x+56+16+7=0
We add all the numbers together, and all the variables
12x+79=0
We move all terms containing x to the left, all other terms to the right
12x=-79
x=-79/12
x=-6+7/12
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