Granddaughter's 7475

Grandma is five times older than her granddaughter today. 2 years ago, the grandmother was six years younger than six times her granddaughter's age. How old is Grandma today?

Correct answer:

b =  80

Step-by-step explanation:


b=5v
b-2 = 6(v-2)-6

b=5·v
b-2 = 6·(v-2)-6

b-5v = 0
b-6v = -16

Row 2 - Row 1 → Row 2
b-5v = 0
-v = -16


v = -16/-1 = 16
b = 0+5v = 0+5 · 16 = 80

b = 80
v = 16

Our linear equations calculator calculates it.



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