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7(j+3)-8=55
We move all terms to the left:
7(j+3)-8-(55)=0
We add all the numbers together, and all the variables
7(j+3)-63=0
We multiply parentheses
7j+21-63=0
We add all the numbers together, and all the variables
7j-42=0
We move all terms containing j to the left, all other terms to the right
7j=42
j=42/7
j=6
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