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-10+4r=-5(2+5r)
We move all terms to the left:
-10+4r-(-5(2+5r))=0
We add all the numbers together, and all the variables
4r-(-5(5r+2))-10=0
We calculate terms in parentheses: -(-5(5r+2)), so:We get rid of parentheses
-5(5r+2)
We multiply parentheses
-25r-10
Back to the equation:
-(-25r-10)
4r+25r+10-10=0
We add all the numbers together, and all the variables
29r=0
r=0/29
r=0
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