Answer:
Gwenny's age is 3 years and Bonny's age is 33years
Step-by-step explanation:
= let Gwenny's age be x
= Then bonny's will be x+30
=Gwenny's age after 12 years will be x+12
= bonny's age will be after 12 years = x+30+12
= x+42
= according to question bonny will be thrice as old as gwenny:
=>3(x+12)=x+42
=>3x+36=x+42
=>3x-x=42-36
=>2x=6
=>x=6\2
=>x=3 years
Gwenny's age is x=3 years
Bonny,s age =x+30=3+30=33years
