13-2r=r+7-8r

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Solution for 13-2r=r+7-8r equation:


Simplifying
13 + -2r = r + 7 + -8r

Reorder the terms:
13 + -2r = 7 + r + -8r

Combine like terms: r + -8r = -7r
13 + -2r = 7 + -7r

Solving
13 + -2r = 7 + -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.
13 + -2r + 7r = 7 + -7r + 7r

Combine like terms: -2r + 7r = 5r
13 + 5r = 7 + -7r + 7r

Combine like terms: -7r + 7r = 0
13 + 5r = 7 + 0
13 + 5r = 7

Add '-13' to each side of the equation.
13 + -13 + 5r = 7 + -13

Combine like terms: 13 + -13 = 0
0 + 5r = 7 + -13
5r = 7 + -13

Combine like terms: 7 + -13 = -6
5r = -6

Divide each side by '5'.
r = -1.2

Simplifying
r = -1.2

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