2r-8=-r+7

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


Simplifying
2r + -8 = -1r + 7

Reorder the terms:
-8 + 2r = -1r + 7

Reorder the terms:
-8 + 2r = 7 + -1r

Solving
-8 + 2r = 7 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-8 + 2r + r = 7 + -1r + r

Combine like terms: 2r + r = 3r
-8 + 3r = 7 + -1r + r

Combine like terms: -1r + r = 0
-8 + 3r = 7 + 0
-8 + 3r = 7

Add '8' to each side of the equation.
-8 + 8 + 3r = 7 + 8

Combine like terms: -8 + 8 = 0
0 + 3r = 7 + 8
3r = 7 + 8

Combine like terms: 7 + 8 = 15
3r = 15

Divide each side by '3'.
r = 5

Simplifying
r = 5

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