Answer:
x = 3/2 y=5
Step-by-step explanation:
4x + 3y = 21
4x + 2y = 16
Subtract the two equations
4x + 3y = 21
-4x - 2y = -16
-----------------------
y = 5
Now find x
4x+3y = 21
4x +3(5) = 2a
4x+15 = 21
Subtract 15
4x = 6
Divide by 4
4x/4 = 6/4
x =3/2
