130=r+42

Solution for 130=r+42 equation:

Simplifying
130 = r + 42

Reorder the terms:
130 = 42 + r

Solving
130 = 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.
130 + -1r = 42 + r + -1r

Combine like terms: r + -1r = 0
130 + -1r = 42 + 0
130 + -1r = 42

Add '-130' to each side of the equation.
130 + -130 + -1r = 42 + -130

Combine like terms: 130 + -130 = 0
0 + -1r = 42 + -130
-1r = 42 + -130

Combine like terms: 42 + -130 = -88
-1r = -88

Divide each side by '-1'.
r = 88

Simplifying
r = 88