Question

How do you solve the following system?: `4x-y=-1 , 6x+5y=18`

Answer 1

x=1/2 and y = 3

Explanation:

Equation 1.`4x-y=-1`
Equation 2.`6x+5y=18`

5times Equation 1.
`5(4x-y=-1)`
`=20x-5y=-5`

Add 5XEquation1 to Equation2
`20x-5y=-5`
`+6x+5y=18`
=>`26x=13`
`x=13/26`
`x=1/2`

Sub x into Equation 1:
`4(1/2)-y=-1`
`2-y=-1`
`-y=-1-2`
`y=-3/-1`
`y=3`