# Algebra Word Problems: Age Calculator

> Solve two present ages from their sum and age difference, then project them to another year.

Page: https://askcalculators.com/calculator/algebra-word-problems-age-calculator/
Definition: https://askcalculators.com/calculator/algebra-word-problems-age-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/algebra-word-problems-age-calculator/schema.json
Version: 1.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/algebra-word-problems-age-calculator/?sumAges=50&ageDifference=10&yearsFromNow=5

## Inputs
- sumAges: Sum of present ages; type=number; required; default=50; min=0
- ageDifference: Older minus younger; type=number; required; default=10; min=0
- yearsFromNow: Years from now (negative for years ago); type=number; required; default=5

## Outputs
- olderAge: Older person now; format=number; primary
- youngerAge: Younger person now; format=number
- olderProjected: Older person at projected time; format=number
- youngerProjected: Younger person at projected time; format=number

## Formula
older = (sum + difference) ÷ 2; younger = (sum − difference) ÷ 2

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.