42-2r=165-3r

Solution for 42-2r=165-3r equation:

Simplifying
42 + -2r = 165 + -3r

Solving
42 + -2r = 165 + -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.
42 + -2r + 3r = 165 + -3r + 3r

Combine like terms: -2r + 3r = 1r
42 + 1r = 165 + -3r + 3r

Combine like terms: -3r + 3r = 0
42 + 1r = 165 + 0
42 + 1r = 165

Add '-42' to each side of the equation.
42 + -42 + 1r = 165 + -42

Combine like terms: 42 + -42 = 0
0 + 1r = 165 + -42
1r = 165 + -42

Combine like terms: 165 + -42 = 123
1r = 123

Divide each side by '1'.
r = 123

Simplifying
r = 123