10r-2r+7=-8-7r

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Solution for 10r-2r+7=-8-7r equation:


Simplifying
10r + -2r + 7 = -8 + -7r

Reorder the terms:
7 + 10r + -2r = -8 + -7r

Combine like terms: 10r + -2r = 8r
7 + 8r = -8 + -7r

Solving
7 + 8r = -8 + -7r

Solving for variable 'r'.

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

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

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

Combine like terms: -7r + 7r = 0
7 + 15r = -8 + 0
7 + 15r = -8

Add '-7' to each side of the equation.
7 + -7 + 15r = -8 + -7

Combine like terms: 7 + -7 = 0
0 + 15r = -8 + -7
15r = -8 + -7

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

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

Simplifying
r = -1

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