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8 votes
8 votes
Two times Ms. Starks age plus Principal Jones age equals 140. Principal Jones's age is also Ms. Starks age plus 32. How old is Principal Jones?

User DBrowne
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1 Answer

12 votes
12 votes

\begin{gathered} \text{If
\begin{gathered} \text{ Replacing the second equation on the first, we have} \\ 2S+(S+32)=140 \\ 3S+32=140 \\ 3S=140-32 \\ S=(108)/(3) \\ S=36 \\ \\ \text{Thus } \\ P=36+32 \\ P=68 \\ \\ \text{ Principal Jones is 68 years old!} \end{gathered}

User Ace
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