Solve the system using elimination.
i.) `3x - 2y = 2`
ii.) `5x - 5y = 10`
Since equation ii) can be simplified by dividing every term by 5 this gives:
ii.) `x - y = 2`
Multiply equation `ii.)` by -2 to get:
`-2 (x - y = 2) => -2x + 2y = -4`
Now add equation i.) and ii.) together:
`3x - 2y = 2`
`-2x + 2y = -4`
This gives: `x = -2`
Substitute x = -2 into one of the original equations to find y.
`3x - 2y = 2`
`3(-2) - 2y = 2`
`-6 - 2y = 2`
`-2y = 8`
`y = -4`
The solution to the system is (-2, -4).
See eNotes Ad-Free
Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.
Already a member? Log in here.