5r+105-3r=-45

Solution for 5r+105-3r=-45 equation:

Simplifying
5r + 105 + -3r = -45

Reorder the terms:
105 + 5r + -3r = -45

Combine like terms: 5r + -3r = 2r
105 + 2r = -45

Solving
105 + 2r = -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 + 2r = -45 + -105

Combine like terms: 105 + -105 = 0
0 + 2r = -45 + -105
2r = -45 + -105

Combine like terms: -45 + -105 = -150
2r = -150

Divide each side by '2'.
r = -75

Simplifying
r = -75