3r+5r-3=13

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Solution for 3r+5r-3=13 equation: 


Simplifying
3r + 5r + -3 = 13

Reorder the terms:
-3 + 3r + 5r = 13

Combine like terms: 3r + 5r = 8r
-3 + 8r = 13

Solving
-3 + 8r = 13

Solving for variable 'r'.

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

Add '3' to each side of the equation.
-3 + 3 + 8r = 13 + 3

Combine like terms: -3 + 3 = 0
0 + 8r = 13 + 3
8r = 13 + 3

Combine like terms: 13 + 3 = 16
8r = 16

Divide each side by '8'.
r = 2

Simplifying
r = 2

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