Question 23254
solve the 1st equation for "y" to get:
y = 14-7x
Substitute that into the 2nd equation to get:
2x - 5(14-7x)= -33
2x - 70+35x = -33
     37x = 37
       x= 1
Substitute that into y=14-7x 
to get y=14-7(1)
       y = 7
So, the solution is x=1, y = 7

cheers,
Stan H.