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22-08-2019
Mathematics

contestada

Maggie's brother is 9 years younger than three times her age. The sum of their ages is 43. How old is Maggie?

Respuesta :

calculista calculista

02-09-2019

Answer:

Maggie's age is 13 years

Step-by-step explanation:

Let

x ------> Maggie's brother age

y ------> Maggie's age

we know that

x+y=43 ------ > equation A

x=3y-9 ------> equation B

substitute equation B in equation A and solve for y

(3y-9)+y=43

4y=43+9

4y=52

y=13

therefore

Maggie's age is 13 years

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