50-8=r

Solution for 50-8=r equation:

Simplifying
50 + -8 = r

Combine like terms: 50 + -8 = 42
42 = r

Solving
42 = r

Solving for variable 'r'.

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

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

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

Add '-42' to each side of the equation.
42 + -42 + -1r = 0 + -42

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

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

Divide each side by '-1'.
r = 42

Simplifying
r = 42