3(100)=100+5s

Solution for 3(100)=100+5s equation:

Simplifying
3(100) = 100 + 5s

Multiply 3 * 100
300 = 100 + 5s

Solving
300 = 100 + 5s

Solving for variable 's'.

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

Add '-5s' to each side of the equation.
300 + -5s = 100 + 5s + -5s

Combine like terms: 5s + -5s = 0
300 + -5s = 100 + 0
300 + -5s = 100

Add '-300' to each side of the equation.
300 + -300 + -5s = 100 + -300

Combine like terms: 300 + -300 = 0
0 + -5s = 100 + -300
-5s = 100 + -300

Combine like terms: 100 + -300 = -200
-5s = -200

Divide each side by '-5'.
s = 40

Simplifying
s = 40