6=7r-8r

Solution for 6=7r-8r equation:

Simplifying
6 = 7r + -8r

Combine like terms: 7r + -8r = -1r
6 = -1r

Solving
6 = -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.
6 + r = -1r + r

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

Add '-6' to each side of the equation.
6 + -6 + r = 0 + -6

Combine like terms: 6 + -6 = 0
0 + r = 0 + -6
r = 0 + -6

Combine like terms: 0 + -6 = -6
r = -6

Simplifying
r = -6