Keri is 10 years less than four times her daughter's age. If Keri is 38 years old, how old is her daughter?

Answer 1

Her daughter is 8 years old.

Answer 2

k + 10 = 4 d
38 + 10 = 4 d
4 d = 48
d = 12

Answer 3

k = Keri's age

d = Daughter's age

Keri is 10 years less than four times her daughter's age means:

k = 4 d - 10

If Keri is 38 years old, then:

38 = 4 d - 10

Add 10 to both sides.

48 = 4 d

This is same as:

4 d = 48

d = 48 / 4

d = 12

Her daughter is 12 years old.