8r-2=8r-9-r

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Solution for 8r-2=8r-9-r equation:


Simplifying
8r + -2 = 8r + -9 + -1r

Reorder the terms:
-2 + 8r = 8r + -9 + -1r

Reorder the terms:
-2 + 8r = -9 + 8r + -1r

Combine like terms: 8r + -1r = 7r
-2 + 8r = -9 + 7r

Solving
-2 + 8r = -9 + 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.
-2 + 8r + -7r = -9 + 7r + -7r

Combine like terms: 8r + -7r = 1r
-2 + 1r = -9 + 7r + -7r

Combine like terms: 7r + -7r = 0
-2 + 1r = -9 + 0
-2 + 1r = -9

Add '2' to each side of the equation.
-2 + 2 + 1r = -9 + 2

Combine like terms: -2 + 2 = 0
0 + 1r = -9 + 2
1r = -9 + 2

Combine like terms: -9 + 2 = -7
1r = -7

Divide each side by '1'.
r = -7

Simplifying
r = -7

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