Question

If 5x-3y=8 and x = 7y/5, then y=

If you could explain, that’d be great.

Answer 1

`Answer \rightarrow\large\boxed{y=2}`

Explanation:

To start off, you are given two equations. One in standard form and one that is already solved for
`x`.

Since
`x=(7y)/(5)`, you already know the
`x` value.

Therefore to find what y equals, plug in whatever x is into the other equation. (remember x is 7y/5)

`\rightarrow5((7y)/(5) )-3y=8`

`\rightarrow5*(7y)/(5) -3y=8`

`\rightarrow7y-3y=8`

`\rightarrow4y=8`

`\rightarrow(4y)/(4) =(8)/(4)`

`\rightarrow\large\boxed{y=2}`