Answer:
[tex]x=1\\y=7[/tex]
Step-by-step explanation:
[tex]-5x+2y=9\\y=7x[/tex]
Replace y in the first equation.
[tex]-5x+2(7x)=9[/tex]
Distribute the 2 and combine like terms;
[tex]-5x+14x=9\\9x=9[/tex]
Divide by 9
[tex]x=\frac{9}{9}\\ x=1[/tex]
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After having found x, you can replace it in any of the equations to find y. I'll use the second equation.
[tex]y=7x\\y=7(1)\\y=7[/tex]
