Find the unit rate of 346 miles on 22 gals

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1

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