ciera16
Feb 10, 2011, 04:55 PM
How do you work out :
x-4y=11
5x-7y=-10
Unknown008
Feb 10, 2011, 10:34 PM
The shortest way would be a substitution.
1. Make x the subject of formula in the first equation.
2. Substitute this into the second formula.
3. Solve for y.
4. Use y to get x.