Question

Diego's age `d` is 5 more than 2 times his sister's age `s`. This situation is represented by the equation `d=2s+5`. If we know Diego's age, which equation will help us find his sister's age?

Answer 1

Answer:  $s=\dfrac{(d-5)}{2}$.

Step-by-step explanation:

Given: d denotes Diego's age while s denotes his sister's age.

The situation is represented by the equation d=2s+5.

To find his sister's age we can write the above equation as $s=\dfrac{(d-5)}{2}$ [we first subtract 5 from both sides and then divide both sides by 2]

Hence, the required equation: $s=\dfrac{(d-5)}{2}$.