# Dad is 10 years older than his three sons ages combined. In how many years will dad's age be same as ages of his sons combined?

## Thanks for the anwser! Sorry ofr the grammar mistakec and unclarity of the question :(

Apr 15, 2017

Currently:

$D = A + B + C + 10 q \quad \square$

In $y$ years time:

$D + y = \left(A + y\right) + \left(B + y\right) + \left(C + y\right)$

$\implies D + y = A + B + C + 3 y q \quad \triangle$

$\triangle - \square \implies$:

$y = 3 y - 10 \implies y = 5$