Question

Solve the system of equations.
- 5x + 2y = 9
y = 7x
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Answer 1

x=1 y=7

Explanation:

Since y=7x, you substitute y in the first equation for 7x, that way the first equation becomes -5x + 2(7x)= 9

-5x +14x = 9

9x =9

x=1

Now you can find y from the second equation

y=7x

y=7*1

y=7