Mother and daughter 2

The mother is 40 years older than her daughter. How old is the mother if her age is eight-thirds age of the daughter?

Correct answer:

m =  64

Step-by-step explanation:

m=40+d m=8/3d m=64

m = 40 + d; m= 8/3d

m = 40 + d
m= 8/3·d

d-m = -40
8d-3m = 0

Pivot: Row 1 ↔ Row 2
8d-3m = 0
d-m = -40

Row 2 - 1/8 · Row 1 → Row 2
8d-3m = 0
-0.63m = -40


m = -40/-0.625 = 64
d = 0+3m/8 = 0+3 · 64/8 = 24

d = 24
m = 64

Our linear equations calculator calculates it.



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