David is $x$ years old. David’s father is thrice the age of David. Write down an expression, in te

Question

David is $x$ years old. David’s father is thrice the age of David. Write down an expression, in terms of $x$, for the father’s age. In $5$ years’ time the sum of their ages is equal to $70$. Write down an expression, in terms of $x$, for the father’s age in $5$ years’ time. Form an equation in terms of $x$. Solve the equation and find the father’s present age.

Accepted Answer

(a) $3x\text{ years}$ (b) $(3x+5)\text{ years}$ (c) $(3x+5)+(x+5)=70$ (d) $45\text{ years}$

Word Problem: Ages (David and His Father)

Word Problem: Ages (David and His Father)

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