A pharmacist filled a prescription for Ana to
take 1/5 of the medicine
in the morning, 1/2
during lunch, and the
rest at night. How
much of the medicine
does she take at night?

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

the answer is d

step-by-step explanation: