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10-12-2021
Mathematics

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y=-1,X+2y=9 solve by substitution show all work

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tinybooyah tinybooyah

10-12-2021

Answer:

x = 11

Step-by-step explanation:

Substitute y = -1 into the equation.

x+2y = 9

; x+2(-1) = 9

x+(-2) = 9

x-2 = 9

x = 9+2

x = 11

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