Math
posted by ilovepink .
Sarah is twothirds as old as Jenny. Jenny is 7 years older than Sarah. Which system of equations could be used to find the girls’ ages?
A. 3s – 2j = 0
j – 7 = s
B. j = 2/3s
s + 7 = j
C. j – 2/3 = s
j – s = 7
D. 2/3j = s
j + 7 = s

and what is your thinking?

i think its D. is that right?