-1=r-8

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Solution for -1=r-8 equation:


Simplifying
-1 = r + -8

Reorder the terms:
-1 = -8 + r

Solving
-1 = -8 + r

Solving for variable 'r'.

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

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

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

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

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

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

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

Simplifying
r = 7

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