9r-3=42

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Solution for 9r-3=42 equation: 


Simplifying
9r + -3 = 42

Reorder the terms:
-3 + 9r = 42

Solving
-3 + 9r = 42

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 + 9r = 42 + 3

Combine like terms: -3 + 3 = 0
0 + 9r = 42 + 3
9r = 42 + 3

Combine like terms: 42 + 3 = 45
9r = 45

Divide each side by '9'.
r = 5

Simplifying
r = 5

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