just seen a post underneath nearly the same, maybe were doing the same course :P but anyway im having real trouble with these and if anyone could help it would be great ( oh and i dont know how to write squared and such so i copied it off that post too

a) x(2) + 3x + 5y = 20

x + 3y = 1

b) 2x + y = 8

4x(2) - 3y(2) = 1

c) x + 2y = 5

5x(2) + 4y(2) + 12x = 29

d) x(2) + y(2) + 4x + 6y - 40 = 0

x - y = 10

thank you

thank you

thank you