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13-12-2018
Mathematics

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For what value of α is (α, 9) a solution of the equation y=2x+1?

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justval justval

13-12-2018

Treat (a, 9) as an x and y value

Set the equation equal to 9

9= 2x+1
8= 2x subtract one
4= x divide by 2

a must be equal to four

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