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4x-7(4-4x)=-100
We move all terms to the left:
4x-7(4-4x)-(-100)=0
We add all the numbers together, and all the variables
4x-7(-4x+4)-(-100)=0
We add all the numbers together, and all the variables
4x-7(-4x+4)+100=0
We multiply parentheses
4x+28x-28+100=0
We add all the numbers together, and all the variables
32x+72=0
We move all terms containing x to the left, all other terms to the right
32x=-72
x=-72/32
x=-2+1/4
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