142=52+r

Solution for 142=52+r equation:

Simplifying
142 = 52 + r

Solving
142 = 52 + 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.
142 + -1r = 52 + r + -1r

Combine like terms: r + -1r = 0
142 + -1r = 52 + 0
142 + -1r = 52

Add '-142' to each side of the equation.
142 + -142 + -1r = 52 + -142

Combine like terms: 142 + -142 = 0
0 + -1r = 52 + -142
-1r = 52 + -142

Combine like terms: 52 + -142 = -90
-1r = -90

Divide each side by '-1'.
r = 90

Simplifying
r = 90