4r-12=18

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Solution for 4r-12=18 equation: 


Simplifying
4r + -12 = 18

Reorder the terms:
-12 + 4r = 18

Solving
-12 + 4r = 18

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + 4r = 18 + 12

Combine like terms: -12 + 12 = 0
0 + 4r = 18 + 12
4r = 18 + 12

Combine like terms: 18 + 12 = 30
4r = 30

Divide each side by '4'.
r = 7.5

Simplifying
r = 7.5

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