3S-15=2S

Solution for 3S-15=2S equation:

Simplifying
3S + -15 = 2S

Reorder the terms:
-15 + 3S = 2S

Solving
-15 + 3S = 2S

Solving for variable 'S'.

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

Add '-2S' to each side of the equation.
-15 + 3S + -2S = 2S + -2S

Combine like terms: 3S + -2S = 1S
-15 + 1S = 2S + -2S

Combine like terms: 2S + -2S = 0
-15 + 1S = 0

Add '15' to each side of the equation.
-15 + 15 + 1S = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 1S = 0 + 15
1S = 0 + 15

Combine like terms: 0 + 15 = 15
1S = 15

Divide each side by '1'.
S = 15

Simplifying
S = 15