3r-4+9r+5=37

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Solution for 3r-4+9r+5=37 equation:


Simplifying
3r + -4 + 9r + 5 = 37

Reorder the terms:
-4 + 5 + 3r + 9r = 37

Combine like terms: -4 + 5 = 1
1 + 3r + 9r = 37

Combine like terms: 3r + 9r = 12r
1 + 12r = 37

Solving
1 + 12r = 37

Solving for variable 'r'.

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

Add '-1' to each side of the equation.
1 + -1 + 12r = 37 + -1

Combine like terms: 1 + -1 = 0
0 + 12r = 37 + -1
12r = 37 + -1

Combine like terms: 37 + -1 = 36
12r = 36

Divide each side by '12'.
r = 3

Simplifying
r = 3

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