How do you solve the system of equations y= \frac { 2} { 7} x - 9 and y = \frac { 7} { 2} x + 8?

1 Answer
Peter L.
Jul 21, 2017

There are many methods to use; but I would suggest to use substitution because you do not have to move the equations to their standard form.

Explanation:

Since both of the equations are equal to y, we can infer that they are the same and solve for x, and then plug in the x-value for the y-value. And you know it's going to have one solution because they are both linear.

2/7x-9 = 7/2x+8

-45/14x=17

x=-238/45

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