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-9r-7=26r-7(5r-7)
We move all terms to the left:
-9r-7-(26r-7(5r-7))=0
We calculate terms in parentheses: -(26r-7(5r-7)), so:We get rid of parentheses
26r-7(5r-7)
We multiply parentheses
26r-35r+49
We add all the numbers together, and all the variables
-9r+49
Back to the equation:
-(-9r+49)
-9r+9r-49-7=0
We add all the numbers together, and all the variables
-56!=0
There is no solution for this equation
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