Answer:
Step-by-step explanation:
5) D 2000/200 = 10
6) C 90/9 = 10
7) B 80/8 = 10
8) A) 10 times 2 =10*2 = 20
3x + y = 7
7 = 5x - 2y
THEN 3x + y = 5x - 2y ... it's like you're taking out the middle man "7"
I think it is B. Hope this helps!
Answer:9
Step-by-step explanation:
7+2=9