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4(4+x)=42
We move all terms to the left:
4(4+x)-(42)=0
We add all the numbers together, and all the variables
4(x+4)-42=0
We multiply parentheses
4x+16-42=0
We add all the numbers together, and all the variables
4x-26=0
We move all terms containing x to the left, all other terms to the right
4x=26
x=26/4
x=6+1/2
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