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

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


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

Reorder the terms:
-8 + 7r + 8r = -2 + -7 + -8

Combine like terms: 7r + 8r = 15r
-8 + 15r = -2 + -7 + -8

Combine like terms: -2 + -7 = -9
-8 + 15r = -9 + -8

Combine like terms: -9 + -8 = -17
-8 + 15r = -17

Solving
-8 + 15r = -17

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 15r = -17 + 8

Combine like terms: -8 + 8 = 0
0 + 15r = -17 + 8
15r = -17 + 8

Combine like terms: -17 + 8 = -9
15r = -9

Divide each side by '15'.
r = -0.6

Simplifying
r = -0.6

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