7r-3=18

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Solution for 7r-3=18 equation: 


Simplifying
7r + -3 = 18

Reorder the terms:
-3 + 7r = 18

Solving
-3 + 7r = 18

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 + 7r = 18 + 3

Combine like terms: -3 + 3 = 0
0 + 7r = 18 + 3
7r = 18 + 3

Combine like terms: 18 + 3 = 21
7r = 21

Divide each side by '7'.
r = 3

Simplifying
r = 3

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