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4x+7(3x-2)=-139
We move all terms to the left:
4x+7(3x-2)-(-139)=0
We add all the numbers together, and all the variables
4x+7(3x-2)+139=0
We multiply parentheses
4x+21x-14+139=0
We add all the numbers together, and all the variables
25x+125=0
We move all terms containing x to the left, all other terms to the right
25x=-125
x=-125/25
x=-5
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