Hi guys I am currently having difficulties with these simultaneous equations, where you have to find out what x is and what y is, i am really confused with what methods you are meant to use for each one. PLEASE HELP I WOULD REALLY APPRECIATE IT THANKS!

1)

4x+3y=3

6x+5y=7

2)

5x-3y=7

3x+5y=-6

3) x+y=4

y=x+2

PLEASE HELP WITH THESE THREE EQUATIONS WITH THE METHODS PLEASE ON HOW TO WORK THEM OUT, THANKYOU!!!