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7(4x+7)-7x=20-8x
We move all terms to the left:
7(4x+7)-7x-(20-8x)=0
We add all the numbers together, and all the variables
7(4x+7)-7x-(-8x+20)=0
We add all the numbers together, and all the variables
-7x+7(4x+7)-(-8x+20)=0
We multiply parentheses
-7x+28x-(-8x+20)+49=0
We get rid of parentheses
-7x+28x+8x-20+49=0
We add all the numbers together, and all the variables
29x+29=0
We move all terms containing x to the left, all other terms to the right
29x=-29
x=-29/29
x=-1
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