Question

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

Answer 1

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 2

when x=3 the value of y is 9

Explanation:

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

`6.4x+2.8y=44.4`

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

`6.4x+2.8y=44.4`

`6.4(3)+2.8y=44.4`

`19.2+2.8y=44.4`

Subtract 19.2 on both sides

`2.8y=25.2`

Divide both sides by 2.8

y=9

So when x=3 the value of y is 9