Question

2x+5y=0
3x-4y=23
solve the following simultaneous equation

Answer 1

`x = 5`,
`y = -2`

Explanation:

`2x + 5y = 0`

`3x - 4y = 23`

By using substitution:

`2x + 5y = 0`

`2x = -5y`

`x = -(5)/(2)y`

`3x - 4y = 23`

`3 (-(5)/(2) y) - 4y = 23`

`-(23)/(2) y = 23`

`y = -2`

`x = -(5)/(2) y`

`x = -(5)/(2) (-2)`

`x = 5`