45r+105-75r=45

Solution for 45r+105-75r=45 equation:

Simplifying
45r + 105 + -75r = 45

Reorder the terms:
105 + 45r + -75r = 45

Combine like terms: 45r + -75r = -30r
105 + -30r = 45

Solving
105 + -30r = 45

Solving for variable 'r'.

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

Add '-105' to each side of the equation.
105 + -105 + -30r = 45 + -105

Combine like terms: 105 + -105 = 0
0 + -30r = 45 + -105
-30r = 45 + -105

Combine like terms: 45 + -105 = -60
-30r = -60

Divide each side by '-30'.
r = 2

Simplifying
r = 2