Question

If P=$30 + 10uand P=$120-15u Solve for p

Answer 1

To solve for u, we substitute the first equation in the second one.

`\begin{gathered} 120-15u=30+10u \\ 120-30=10u+15u \\ 25u=90 \\ u=(90)/(25)=3.6 \end{gathered}`

Now, we find P.

`\begin{gathered} P=30+10(3.6)=30+36 \\ P=66 \end{gathered}`

Therefore, P is 66.