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-3x+4(4x+7)=-115
We move all terms to the left:
-3x+4(4x+7)-(-115)=0
We add all the numbers together, and all the variables
-3x+4(4x+7)+115=0
We multiply parentheses
-3x+16x+28+115=0
We add all the numbers together, and all the variables
13x+143=0
We move all terms containing x to the left, all other terms to the right
13x=-143
x=-143/13
x=-11
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