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7(x+4)=3x+56
We move all terms to the left:
7(x+4)-(3x+56)=0
We multiply parentheses
7x-(3x+56)+28=0
We get rid of parentheses
7x-3x-56+28=0
We add all the numbers together, and all the variables
4x-28=0
We move all terms containing x to the left, all other terms to the right
4x=28
x=28/4
x=7
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