A parent is 6 times as old as their child. Together they are 28. How old is each?
The child is 4 and the parent is 24.
How to work it out
- 1
Let x be the child's age. The parent is 6 times as old, so the parent is 6x.
- 2
Together they are 28:
- 3
Combine the x terms and divide:
- 4
The parent is 6 × 4 = 24.
- 5
Check: 4 + 24 = 28 ✓ and 24 = 6 × 4 ✓.
LaTeX source of the formulas on this page
\[ x + 6x = 28\ \Rightarrow\ x = 4 \]
\[ x + 6x = 28 \]
\[ 7x = 28\ \Rightarrow\ x = \frac{28}{7} = 4 \]Questions
How old is the child?
4.
How old is the parent?
24.