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84=7(j+10)
We move all terms to the left:
84-(7(j+10))=0
We calculate terms in parentheses: -(7(j+10)), so:We get rid of parentheses
7(j+10)
We multiply parentheses
7j+70
Back to the equation:
-(7j+70)
-7j-70+84=0
We add all the numbers together, and all the variables
-7j+14=0
We move all terms containing j to the left, all other terms to the right
-7j=-14
j=-14/-7
j=+2
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