r-10=80

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Solution for r-10=80 equation: 


Simplifying
r + -10 = 80

Reorder the terms:
-10 + r = 80

Solving
-10 + r = 80

Solving for variable 'r'.

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

Add '10' to each side of the equation.
-10 + 10 + r = 80 + 10

Combine like terms: -10 + 10 = 0
0 + r = 80 + 10
r = 80 + 10

Combine like terms: 80 + 10 = 90
r = 90

Simplifying
r = 90

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