Question 646970
How do I write an equation that models how old in years a 43, 55, and 15
 year old will be, when our ages add up to 150 years old. 
:
Let y = no. yrs for this to be true
:
Each will age y yrs, therefore
(y+43) + (y+55) + (y+15) = 150
3y + 113 = 150
3y = 150 - 113
3y = 37
y = 37/3
y = 12{{{1/3}}} yrs
:
Add 12{{{1/3}}} to each ones age
55{{{1/3}}} + 67{{{1/3}}} + 27{{{1/3}}} = 150