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OpenStudy (anonymous):
Help me !! If the point (a, 7) lies on the graph of the equation 5x - y = 8, then a= -3 3 1/5
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OpenStudy (anonymous):
Im just think that its 3 but im not sure.
OpenStudy (hunus):
Ordered pairs are of the form (x, y) so if y is 7, what is x?
OpenStudy (anonymous):
unknown
OpenStudy (hunus):
Plug y = 7 into your equation, 5x - y = 8 and solve for x
OpenStudy (hunus):
a is the x-coordinate or that point
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OpenStudy (anonymous):
What?
OpenStudy (hunus):
a in (a, 7) is the x-coordinate, and 7 is the y-coordinate. So if you plug in y = 7 into 5x - y = 8 then you can solve for a
OpenStudy (anonymous):
its 3
OpenStudy (hunus):
Yup :)
OpenStudy (anonymous):
Thank you (:
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