in this equation you can eliminate the x value
multiply the second equation by -2 and you get:
-2x - 2y = -10
when you add the two equations the x factors will cancel
2x + 3y = 6
- 2x - 2y = -10
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y = 16
you can find the x value by plugging the y value that you now know into one of the equations that you started off with.