Respuesta :

6.4x + 2.8y = 44.4 

6.4(3) + 2.8y = 44.4

19.2 + 2.8y = 44.4
-19.2             -19.2 

2.8y = 25.2
------    ------
2.8      2.8

y = 9

Answer:

when x=3 the value of y is 9

Step-by-step explanation:

6.4x+2.8y=44.4, when x=3

[tex]6.4x+2.8y=44.4[/tex]

To find y when x=3, plug in 3 for x in the given equation

[tex]6.4x+2.8y=44.4[/tex]

[tex]6.4(3)+2.8y=44.4[/tex]

[tex]19.2+2.8y=44.4[/tex]

Subtract 19.2 on both sides

[tex]2.8y=25.2[/tex]

Divide both sides by 2.8

y=9

So when x=3 the value of y is 9

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