Answer:
X+7
Step-by-step explanation:
If the youngest child's age expression is X+3 then the middle child's would be x+5 and the oldest would X+7. Even numbers have a difference of 2 between them and that is why 2 is gradually added to each age expression. Hope that helps.
16,19
mathzz
triangle
Subtract 2.7 on both sides
Multiply by 9
divide by -2
Good luck!
Intelligent Muslim,
From Uzbekistan.