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3x+4y=43 when x= 9

Guest Apr 4, 2017
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3x+4y=43 when x= 9. Just substitute.

 

(3 x 9) + 4y = 43

27 + 4y = 43 subtract 27 from both sides

4y =43 - 27

4y = 16 divide both sides by 4

y = 16 / 4

y = 4

Guest Apr 4, 2017

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