Question

150 - 1/2s = 120 + 1/4s

Answer 1

40

Explanation:

First, get all the s on the same side

add 1/2s to both sides

`150 = 120 + (3)/(4)s`

Next, subtract 120 from both sides to get s by itself

`30 = (3)/(4)s`

Now, multiply both sides by 4 to get rid of the fraction

120 = 3s

Lastly, divide both sides by 3 to get s by itself

s = 40

Answer 2

s=40

Explanation:

Combine s and 1/2.

150−s/2=120+1/4s

Combine 1/4and s.

150−s/2=120+s/4

Move all terms containing s to the left side of the equation.

150−3s/4=120

Move all terms not containing s to the right side of the equation.

−3s/4=−30

Multiply both sides of the equation by −4/3.

−4/3 x (−3s/4)=−4/3 x−30 => S=40