9r+3r-5=25

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Solution for 9r+3r-5=25 equation:


Simplifying
9r + 3r + -5 = 25

Reorder the terms:
-5 + 9r + 3r = 25

Combine like terms: 9r + 3r = 12r
-5 + 12r = 25

Solving
-5 + 12r = 25

Solving for variable 'r'.

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

Add '5' to each side of the equation.
-5 + 5 + 12r = 25 + 5

Combine like terms: -5 + 5 = 0
0 + 12r = 25 + 5
12r = 25 + 5

Combine like terms: 25 + 5 = 30
12r = 30

Divide each side by '12'.
r = 2.5

Simplifying
r = 2.5

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