8r-1=15r-15

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Solution for 8r-1=15r-15 equation:


Simplifying
8r + -1 = 15r + -15

Reorder the terms:
-1 + 8r = 15r + -15

Reorder the terms:
-1 + 8r = -15 + 15r

Solving
-1 + 8r = -15 + 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
-1 + 8r + -15r = -15 + 15r + -15r

Combine like terms: 8r + -15r = -7r
-1 + -7r = -15 + 15r + -15r

Combine like terms: 15r + -15r = 0
-1 + -7r = -15 + 0
-1 + -7r = -15

Add '1' to each side of the equation.
-1 + 1 + -7r = -15 + 1

Combine like terms: -1 + 1 = 0
0 + -7r = -15 + 1
-7r = -15 + 1

Combine like terms: -15 + 1 = -14
-7r = -14

Divide each side by '-7'.
r = 2

Simplifying
r = 2

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