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13-09-2020
Mathematics

contestada

Solve by elimination:
4x+9y=28
-4x-y=-28

Respuesta :

oshinugamorufat oshinugamorufat

13-09-2020

Step-by-step explanation:

4x+9y=28

-4x-y=-28

8y=0

divide both side by 8

y=0

solve for X in equation 1

4(X)-9(0)=28

4x-0=28

4x =28

divide both side by 4

4x/4=28/4

X= 7

y=0,x=7

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