Question

Your brother is 1/3 your age. Your sister is 6 years older than your brother. Your sister is 10 years old. Write and solve an equation to find your age a.

Answer 1

12 years old

Explanation:

x = my age

y = my sister's age

z= my brother's age

equations

1/3x=z

z+6=y

y=10

sustitution

z+6=y

z+6=10

z=10-6

z=4

1/3x=4

x=4/(1/3)

x=12