55=9r-8

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Solution for 55=9r-8 equation:


Simplifying
55 = 9r + -8

Reorder the terms:
55 = -8 + 9r

Solving
55 = -8 + 9r

Solving for variable 'r'.

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

Add '-9r' to each side of the equation.
55 + -9r = -8 + 9r + -9r

Combine like terms: 9r + -9r = 0
55 + -9r = -8 + 0
55 + -9r = -8

Add '-55' to each side of the equation.
55 + -55 + -9r = -8 + -55

Combine like terms: 55 + -55 = 0
0 + -9r = -8 + -55
-9r = -8 + -55

Combine like terms: -8 + -55 = -63
-9r = -63

Divide each side by '-9'.
r = 7

Simplifying
r = 7

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