Eliminating a variable

Maths

3x+2y=5 AND 3x-2y=7.  If I add these two equations together, which unknown will be eliminated?

3x+2y=5 AND 3x-2y=7. If I subtract the two equations, which unknown will be eliminated?

3x-5y=17 AND 2x-5y=10. Subtract the first equation from the second equation.

2x-5y=10 AND 3x-5y=17. Add the two equations together.

3x-5y=17 AND 7x-5y=20. How can I eliminate y from these simultaneous equations?

If x=3 and 2x+5y=41, what is the value of y?

7x+2y=24 AND 4x+2y=18.  Find the value of 3x

7x+2y=24 AND 4x + 2y = 18. Find the value of y