3=4r-5r

Solution for 3=4r-5r equation:

Simplifying
3 = 4r + -5r

Combine like terms: 4r + -5r = -1r
3 = -1r

Solving
3 = -1r

Solving for variable 'r'.

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

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

Combine like terms: -1r + r = 0
3 + r = 0

Add '-3' to each side of the equation.
3 + -3 + r = 0 + -3

Combine like terms: 3 + -3 = 0
0 + r = 0 + -3
r = 0 + -3

Combine like terms: 0 + -3 = -3
r = -3

Simplifying
r = -3