7-8r=-25

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Solution for 7-8r=-25 equation: 


Simplifying
7 + -8r = -25

Solving
7 + -8r = -25

Solving for variable 'r'.

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

Add '-7' to each side of the equation.
7 + -7 + -8r = -25 + -7

Combine like terms: 7 + -7 = 0
0 + -8r = -25 + -7
-8r = -25 + -7

Combine like terms: -25 + -7 = -32
-8r = -32

Divide each side by '-8'.
r = 4

Simplifying
r = 4

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