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15r+14=2(5r+6)
We move all terms to the left:
15r+14-(2(5r+6))=0
We calculate terms in parentheses: -(2(5r+6)), so:We get rid of parentheses
2(5r+6)
We multiply parentheses
10r+12
Back to the equation:
-(10r+12)
15r-10r-12+14=0
We add all the numbers together, and all the variables
5r+2=0
We move all terms containing r to the left, all other terms to the right
5r=-2
r=-2/5
r=-2/5
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