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-(1-5x)-7(-3x-4)=-51
We move all terms to the left:
-(1-5x)-7(-3x-4)-(-51)=0
We add all the numbers together, and all the variables
-(-5x+1)-7(-3x-4)-(-51)=0
We add all the numbers together, and all the variables
-(-5x+1)-7(-3x-4)+51=0
We multiply parentheses
-(-5x+1)+21x+28+51=0
We get rid of parentheses
5x+21x-1+28+51=0
We add all the numbers together, and all the variables
26x+78=0
We move all terms containing x to the left, all other terms to the right
26x=-78
x=-78/26
x=-3
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