Given the expression:
[tex]2y+7x=4[/tex]We have, for the cases when x=5,10 and 15:
[tex]\begin{gathered} x=5 \\ \Rightarrow2y+7(5)=4 \\ \Rightarrow2y=4─35=─29 \\ \Rightarrow y=\frac{─29}{2} \\ \\ x=10 \\ \Rightarrow2y+7(10)=4 \\ \Rightarrow2y=4─70=─66 \\ \Rightarrow y=\frac{─66}{2}=─33 \\ y=─33 \\ \\ x=15 \\ \Rightarrow2y+7(15)=4 \\ \Rightarrow2y=4─105=─101 \\ \Rightarrow y=\frac{─101}{2} \end{gathered}[/tex]therefore, if x= 5, then y= -29/2, if x=10, then y=-33 and if x=15, then y=-101/2
