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49=7(3y+1)
We move all terms to the left:
49-(7(3y+1))=0
We calculate terms in parentheses: -(7(3y+1)), so:We get rid of parentheses
7(3y+1)
We multiply parentheses
21y+7
Back to the equation:
-(21y+7)
-21y-7+49=0
We add all the numbers together, and all the variables
-21y+42=0
We move all terms containing y to the left, all other terms to the right
-21y=-42
y=-42/-21
y=+2
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