7r+8r=-15

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Solution for 7r+8r=-15 equation: 


Simplifying
7r + 8r = -15

Combine like terms: 7r + 8r = 15r
15r = -15

Solving
15r = -15

Solving for variable 'r'.

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

Divide each side by '15'.
r = -1

Simplifying
r = -1

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