8r-13=-31+2r

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Solution for 8r-13=-31+2r equation:


Simplifying
8r + -13 = -31 + 2r

Reorder the terms:
-13 + 8r = -31 + 2r

Solving
-13 + 8r = -31 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
-13 + 8r + -2r = -31 + 2r + -2r

Combine like terms: 8r + -2r = 6r
-13 + 6r = -31 + 2r + -2r

Combine like terms: 2r + -2r = 0
-13 + 6r = -31 + 0
-13 + 6r = -31

Add '13' to each side of the equation.
-13 + 13 + 6r = -31 + 13

Combine like terms: -13 + 13 = 0
0 + 6r = -31 + 13
6r = -31 + 13

Combine like terms: -31 + 13 = -18
6r = -18

Divide each side by '6'.
r = -3

Simplifying
r = -3

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