15=5-3r+8r

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Solution for 15=5-3r+8r equation:


Simplifying
15 = 5 + -3r + 8r

Combine like terms: -3r + 8r = 5r
15 = 5 + 5r

Solving
15 = 5 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
15 + -5r = 5 + 5r + -5r

Combine like terms: 5r + -5r = 0
15 + -5r = 5 + 0
15 + -5r = 5

Add '-15' to each side of the equation.
15 + -15 + -5r = 5 + -15

Combine like terms: 15 + -15 = 0
0 + -5r = 5 + -15
-5r = 5 + -15

Combine like terms: 5 + -15 = -10
-5r = -10

Divide each side by '-5'.
r = 2

Simplifying
r = 2

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