Question

Nao is going on a cruise in a little while so two days off

Answer 1

Step 1

Find the value of x using the elimination method

Given;

`\begin{gathered} 5x+7y=9---(1) \\ 3x+7y=11---(2) \end{gathered}`

Hence,

`\begin{gathered} 2x=-2 \\ (2x)/(2)=(-2)/(2) \\ x=-1 \end{gathered}`

Step 2

Find the value of y

`\begin{gathered} \text{From 1} \\ 5x+7y=9 \\ 5(-1)\text{+7y=9} \\ -5+7y=9 \\ 7y=9+5 \\ 7y=14 \\ (7y)/(7)=(14)/(7) \\ y=\text{ 2} \end{gathered}`

Hence, x = -1 and y = 2