Answer:
x=5, y=6. (5, 6).
Step-by-step explanation:
6x+2y=42
-6x+12y=42
-------------------
14y=84
y=84/14
y=6
6x+2(6)=42
6x+12=42
6x=42-12
6x=30
x=30/6
x=5
