I have tried the other questions but i'm stuck on this last 3 and would really appreciate the help as I am finding it difficult.
2x+3y=12 x=?
3x+y=11 y=?
4x+3y=15 x=?
x-2y=12 y=?
x+4y=14 x=?
3x+2y=-3 y=?
Thanks.
For 1) Multiply the second equation by 3, and then solve by elimination. For 2) use the fact that $\displaystyle x=2y+12$ and substitute this into the first equation. For 3), multiply the second equation by 2 and then solve by elimination.
If you seek further help, please show some work.