Solve the simultaneous equation:

2x + 3y = 9

3x - y = 8

3x - y = 8 ... add y to both sides, subtract 8 from both sides

3x - 8 = y

so we sub 3x - 8 in for y in the other equation

2x + 3y = 9

2x + 3 (3x - 8) = 9

2x + 9x - 24 = 9

2x + 9x = 9 + 24

11x = 33

x = 33/11

x = 3

3x - 8 = y

3 (3) - 8 = y

9 - 8 = y

1 = y

so ur solution is (3,1) <==