Question

solve the system of equations

2x-y=4 and 4x+y=2

Thanks.

Answer 1

Your teacher should have given you what X= alternativly what Y= then you should work out what either X or Y stands for. Take your first equation for example..

2x-y=4
Q. IF X EQUALS 2 WHAT IS Y?
Substitute x with four
2(2)-y=4
Now times 2 by the number in the brackets
2x2=4
so the equation now reads
4-y=4
in this case
Y=zero

remember this is just an example! Insert the value of Y or X into your equations and work it out!