5r-30=3r+12

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Solution for 5r-30=3r+12 equation:


Simplifying
5r + -30 = 3r + 12

Reorder the terms:
-30 + 5r = 3r + 12

Reorder the terms:
-30 + 5r = 12 + 3r

Solving
-30 + 5r = 12 + 3r

Solving for variable 'r'.

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

Add '-3r' to each side of the equation.
-30 + 5r + -3r = 12 + 3r + -3r

Combine like terms: 5r + -3r = 2r
-30 + 2r = 12 + 3r + -3r

Combine like terms: 3r + -3r = 0
-30 + 2r = 12 + 0
-30 + 2r = 12

Add '30' to each side of the equation.
-30 + 30 + 2r = 12 + 30

Combine like terms: -30 + 30 = 0
0 + 2r = 12 + 30
2r = 12 + 30

Combine like terms: 12 + 30 = 42
2r = 42

Divide each side by '2'.
r = 21

Simplifying
r = 21

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