15=3.4s-2s

Solution for 15=3.4s-2s equation:

Simplifying
15 = 3.4s + -2s

Combine like terms: 3.4s + -2s = 1.4s
15 = 1.4s

Solving
15 = 1.4s

Solving for variable 's'.

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

Add '-1.4s' to each side of the equation.
15 + -1.4s = 1.4s + -1.4s

Combine like terms: 1.4s + -1.4s = 0.0
15 + -1.4s = 0.0

Add '-15' to each side of the equation.
15 + -15 + -1.4s = 0.0 + -15

Combine like terms: 15 + -15 = 0
0 + -1.4s = 0.0 + -15
-1.4s = 0.0 + -15

Combine like terms: 0.0 + -15 = -15
-1.4s = -15

Divide each side by '-1.4'.
s = 10.71428571

Simplifying
s = 10.71428571