Question

How do you solve the system `7 + 2y = 8x` and `3x - 2y = 0` by substitution?

Answer 1

`x=7/5,y=21/10`

Explanation:

from the second equation we get

`x=2/3y`
plugging this in the first one:

`7+2y=16/3y`
`7=16/3y-2y`
`7=10/3y`
so `y=21/10`
`x=7/5`