Question

Please answer both parts I'm really stuck on this problem.

Answer 1

J=john's age
d=daughter's age

j=4+3d



A. if d=10
j=4+3d
j=4+3(10)
j=4+30
j=34


B.
for d=9
j=4+3d
j=4+3(9)
j=4+27
j=31

compare, hmm
34 vs 31 is 3 years difference