2r+7r=-7+8r

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Solution for 2r+7r=-7+8r equation: 


Simplifying
2r + 7r = -7 + 8r

Combine like terms: 2r + 7r = 9r
9r = -7 + 8r

Solving
9r = -7 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
9r + -8r = -7 + 8r + -8r

Combine like terms: 9r + -8r = 1r
1r = -7 + 8r + -8r

Combine like terms: 8r + -8r = 0
1r = -7 + 0
1r = -7

Divide each side by '1'.
r = -7

Simplifying
r = -7

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