10-r=-2r

Solution for 10-r=-2r equation:

Simplifying
10 + -1r = -2r

Solving
10 + -1r = -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
10 + -1r + 2r = -2r + 2r

Combine like terms: -1r + 2r = 1r
10 + 1r = -2r + 2r

Combine like terms: -2r + 2r = 0
10 + 1r = 0

Add '-10' to each side of the equation.
10 + -10 + 1r = 0 + -10

Combine like terms: 10 + -10 = 0
0 + 1r = 0 + -10
1r = 0 + -10

Combine like terms: 0 + -10 = -10
1r = -10

Divide each side by '1'.
r = -10

Simplifying
r = -10