Question

ince neither equation is written as “p = some value” or “s = some value” yet, we can rewrite either equation in terms of s or in terms of p. Let’s rewrite the second equation in terms of s. What move can you make to both sides of the equation to get rid of p on the left side of the equation, so that s is alone on the left?
0.75s+0.5p = 13
s+p = 20

s+p = 20

Divide both sides by p

Multiply both sides by p

Subtract p from both sides

Add p to both sides

Answer 1

To rewrite the second equation \( s + p = 20 \) in terms of \( s \), you want to isolate \( s \) on one side of the equation. The move you can make is:

**Subtract \( p \) from both sides.**

This will result in:

\[ s = 20 - p \]

This expresses \( s \) in terms of \( p \).