DaisyMartinez4 DaisyMartinez4

09-10-2018
Mathematics

contestada

Sally is 10 years older than one fifth of her mother’s age. If Sally is 20 years old, how old is her mother?

Respuesta :

22-10-2018

S = Sally

M = Mother

S = M/5 + 10

20 = M/5 + 10

20 - 10 = M/5

10 = M/5

M = 10 * 5

M = 50

----------------

Her mother is 50 yo

-----------------

50 : 5 + 10 = 20

the answer is good

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