5r+3=42

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Solution for 5r+3=42 equation: 


Simplifying
5r + 3 = 42

Reorder the terms:
3 + 5r = 42

Solving
3 + 5r = 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 + 5r = 42 + -3

Combine like terms: 3 + -3 = 0
0 + 5r = 42 + -3
5r = 42 + -3

Combine like terms: 42 + -3 = 39
5r = 39

Divide each side by '5'.
r = 7.8

Simplifying
r = 7.8

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