Step-by-step explanation:
a) Polly's age = x+4 years
b) Anders and Polly's age = x+(x+4) years
c) When x=11 , put in equation 11+(11+4)=11+15=26---> T
d) T=40 x+(x+4)=40
=> 2x+4 = 40
=> 2x. = 36
=> x. = 36/2
=> x. = 18.
Hope it helps you.
