Question

If r=9 and 4r+3s=75, what is the value of s?

Answer 1

4(9) + 3s = 75
36 + 3s = 75
3s = 39
s = 13

Answer 2

s = 13

Explanation:

4r+3s=75 , r = 9

Since we know the value of r, we can substitute the value of r into the above equation to find s

That's

4( 9) + 3s = 75

36 + 3s = 75

Group like terms

3s = 75 - 36

3s = 39

Divide both sides by 3

That's

`(3s)/(3) = (39)/(3)`

We have the final answer as

s = 13

Hope this helps you