3(r+5)-r=-3+8r

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Solution for 3(r+5)-r=-3+8r equation:


Simplifying
3(r + 5) + -1r = -3 + 8r

Reorder the terms:
3(5 + r) + -1r = -3 + 8r
(5 * 3 + r * 3) + -1r = -3 + 8r
(15 + 3r) + -1r = -3 + 8r

Combine like terms: 3r + -1r = 2r
15 + 2r = -3 + 8r

Solving
15 + 2r = -3 + 8r

Solving for variable 'r'.

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

Add '-8r' to each side of the equation.
15 + 2r + -8r = -3 + 8r + -8r

Combine like terms: 2r + -8r = -6r
15 + -6r = -3 + 8r + -8r

Combine like terms: 8r + -8r = 0
15 + -6r = -3 + 0
15 + -6r = -3

Add '-15' to each side of the equation.
15 + -15 + -6r = -3 + -15

Combine like terms: 15 + -15 = 0
0 + -6r = -3 + -15
-6r = -3 + -15

Combine like terms: -3 + -15 = -18
-6r = -18

Divide each side by '-6'.
r = 3

Simplifying
r = 3

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