Question

Mercado is 37 years old. His age is 5 years more than four times his daughter's age. How old is his daughter?

Answer 1

x - daughter's age


`37=4x+5\\ 4x=32\\ x=8`

Answer 2

So,

Let Mercado's age be m and his daughter's age be d.

Our first equation: m = 37

Our second equation: m = 5 + 4d

Substitute 37 for m
37 = 5 + 4d

Subtract 5 from both sides
32 = 4d

Divide both sides by 4
8 = d

His daughter is 8 years old.