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F the point (a, 7) lies on the graph of the equation 5x - y = 8, then a=
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F the point (a, 7) lies on the graph of the equation 5x - y = 8, then a=

User Left For Archive
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(a,7) lies on the equation of 5x-y=8, that means we solve for x when y=7.

5x-(7)=8
5x=8+7=15
x=3
=>
a=3
User Windtalker
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