contestada

Three siblings are each 3 years apart. If the total number of years between them is 90 years, how old is the oldest sibling

Respuesta :

Answer:

33 years old

Step-by-step explanation:

x = youngest sibling

y = oldest sibling

x + (x + 3) + (x + 3 + 3) = 90

3x + 9 = 90

3x = 81

x = 27

y = 27 + 3 + 3 = 33

Otras preguntas