45=r+(-63)

Solution for 45=r+(-63) equation:

Simplifying
45 = r + (-63)
45 = r + -63

Reorder the terms:
45 = -63 + r

Solving
45 = -63 + 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.
45 + -1r = -63 + r + -1r

Combine like terms: r + -1r = 0
45 + -1r = -63 + 0
45 + -1r = -63

Add '-45' to each side of the equation.
45 + -45 + -1r = -63 + -45

Combine like terms: 45 + -45 = 0
0 + -1r = -63 + -45
-1r = -63 + -45

Combine like terms: -63 + -45 = -108
-1r = -108

Divide each side by '-1'.
r = 108

Simplifying
r = 108