Answer:
In 47 years Peter will be 75 years old
Explanation:
If Peter will be 54 years old in 26 years then subtract 26 from 54
54-26=28
This means that Peter is 28 right now, if you want to double check that work then add 26 to 28 implying that in 26 years Peter with be 54 years old
28+26=54
This shows that your calculations are correct! Now you have to figure out how many years from now will Peter be when he turns 75 years old, so you subtract his current age which is 28 from 75
75-28=47
Now to double check this add 47 to his current age which is 28
28+47= 75
This shows that your calculations are correct and it will take 47 years for Peter to be 75 years old!