Respuesta :

TaeKwonDoIsDead

Answer:

9

Step-by-step explanation:

We need to first plug in 3 into the place of "x" and then do some algebra and solve for the value of y. The steps are shown below:

[tex]6.4x+2.8y=44.4\\6.4(3)+2.8y=44.4\\19.2+2.8y=44.4\\2.8y=44.4-19.2\\2.8y=25.2\\y=\frac{25.2}{2.8}\\y=9[/tex]

Hence, the value of y is 9

kudzordzifrancis

Answer:

When, x=3, the value of y is 9

Step-by-step explanation:

The given equation is;

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

Let us multiply through by 10 to get;

[tex]64x+28y=444[/tex]

When x=3, we get;

[tex]64(3)+28y=444[/tex]

[tex]192+28y=444[/tex]

Group similar terms;

[tex]28y=444-192[/tex]

[tex]28y=252[/tex]

Divide both sides by 28

[tex]y=\frac{252}{28}[/tex]

[tex]y=9[/tex]

When x=3, y=9

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