Question

I am three years younger than my brother, and I am 2 years older than my sister. My mom's age is one less than three times my brother's age. When you add all our ages, you get 87. What are our ages?

Answer 1

Answer:

your age=13

your brother's age=16

your sister's age =11

your mom's age =47

Step-by-step explanation:

let's assume your age is =X

you are three years younger than your brother

then your brother's age =X+3

you are 2 years older than your sister

then your sister's age =X-2

your mom's age is one less than three times your brother's age

then your mom's age =3(X+3) -1

total of ages is =87

(X) +(X+3) +(X-2) +( 3(X+3) -1) =87

6X+9 =87

6X =87-9

X =78÷6

X=13