-25=r-9

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Solution for -25=r-9 equation: 


Simplifying
-25 = r + -9

Reorder the terms:
-25 = -9 + r

Solving
-25 = -9 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-25 + -1r = -9 + r + -1r

Combine like terms: r + -1r = 0
-25 + -1r = -9 + 0
-25 + -1r = -9

Add '25' to each side of the equation.
-25 + 25 + -1r = -9 + 25

Combine like terms: -25 + 25 = 0
0 + -1r = -9 + 25
-1r = -9 + 25

Combine like terms: -9 + 25 = 16
-1r = 16

Divide each side by '-1'.
r = -16

Simplifying
r = -16

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