Given data:
The first equation is y=4x.
The second equation is 8x+y=18.
Substitute first equation into second equation.
[tex]\begin{gathered} 8x+4x=18 \\ 12x=18 \\ x=\frac{3}{2} \end{gathered}[/tex]Substitute 3/2 for x in the first equation.
[tex]\begin{gathered} y=4(\frac{3}{2}) \\ =6 \end{gathered}[/tex]Thus, the value of x is 3/2, and the value of y is 6.
