-3.5-1.25(r)=-13.5

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Solution for -3.5-1.25(r)=-13.5 equation: 


Simplifying
-3.5 + -1.25(r) = -13.5

Solving
-3.5 + -1.25r = -13.5

Solving for variable 'r'.

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

Add '3.5' to each side of the equation.
-3.5 + 3.5 + -1.25r = -13.5 + 3.5

Combine like terms: -3.5 + 3.5 = 0.0
0.0 + -1.25r = -13.5 + 3.5
-1.25r = -13.5 + 3.5

Combine like terms: -13.5 + 3.5 = -10
-1.25r = -10

Divide each side by '-1.25'.
r = 8

Simplifying
r = 8

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