-9r=-10r+13

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Solution for -9r=-10r+13 equation: 


Simplifying
-9r = -10r + 13

Reorder the terms:
-9r = 13 + -10r

Solving
-9r = 13 + -10r

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '10r' to each side of the equation.
-9r + 10r = 13 + -10r + 10r

Combine like terms: -9r + 10r = 1r
1r = 13 + -10r + 10r

Combine like terms: -10r + 10r = 0
1r = 13 + 0
1r = 13

Divide each side by '1'.
r = 13

Simplifying
r = 13

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