Which situation can be represented by the equation
?
y=x+21
A
Debbie has y dollars.
She earns $21 each week for x weeks.
B
Debbie is y years old.
She is 21 years older than her sister who is x years old.
C
Debbie exercises for x minutes.
She does a warm-up for 21 minutes followed by a video workout for y minutes.
D
Debbie drank x ounces of water.
This is 21 times the amount of y, the amount her son drank.
