Answer:
A
Step-by-step explanation:
this is because an input can only have one output, but an output can have many input
10x=1/2x+3
I think it's right, but not 100% sure
-1/2w-3/5=1/5w
-5w-6=2w
-5w-2w=6
-7w=6
w = -6/7
Year 1: 7lbs x 3years= 21lbs
Year 2: 21lbs x 3years = 63lbs
