Question

Solve 5s + 40 = 55 using number sense. Please help! Thanks! :)

Answer 1

"Number sense" ??

Start by subtracting 40 from both sides of the given equation.

Answer 2

Simplifying
5s + 40 = 55

Reorder the terms:
40 + 5s = 55

Solving
40 + 5s = 55

Solving for variable 's'.

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

Add '-40' to each side of the equation.
40 + -40 + 5s = 55 + -40

Combine like terms: 40 + -40 = 0
0 + 5s = 55 + -40
5s = 55 + -40

Combine like terms: 55 + -40 = 15
5s = 15

Divide each side by '5'.
s = 3

Simplifying
s = 3

Answer 3

I know, I don't get "number sense" either. Thanks! :) I'll make sure to become a fan! :)