9r-21=-69+r

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Solution for 9r-21=-69+r equation:


Simplifying
9r + -21 = -69 + r

Reorder the terms:
-21 + 9r = -69 + r

Solving
-21 + 9r = -69 + 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.
-21 + 9r + -1r = -69 + r + -1r

Combine like terms: 9r + -1r = 8r
-21 + 8r = -69 + r + -1r

Combine like terms: r + -1r = 0
-21 + 8r = -69 + 0
-21 + 8r = -69

Add '21' to each side of the equation.
-21 + 21 + 8r = -69 + 21

Combine like terms: -21 + 21 = 0
0 + 8r = -69 + 21
8r = -69 + 21

Combine like terms: -69 + 21 = -48
8r = -48

Divide each side by '8'.
r = -6

Simplifying
r = -6

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