Question

Mă poate ajuta cineva?
Phoebe,Andy and Polly share £270.
Phoebe gets three times as much as Andy who gets twice as much as Polly.
Work out how much they each get.

Answer 1

Răspuns:

30,60,180

Explicație pas cu pas:

a+b+c=270

a=Phoebe

b=Andy

c=Polly

a=3b Money of Phoebe - 3 times as much as Andy

b=2c Money of Andy      - 2 times as much as Polly

then if a=3b

we have a=3(2c)

a=6c

a+b+c=270

6c+2c+c=270

9c=270

c=270:9

c=30 ,Polly has £30

then b=2c

b=2x30

b=60 ,Andy has £60

a+b+c=270

a+60+30=270

a+90=270

a=270-90

a=180, Phoebe has £180

Answer 2

Răspuns:

Explicație pas cu pas:

/------/------/------/------/-----/------/ Phoebe

/------/------/ Andy

/------/ Polly } 270

270 : 9 = 30 £ Polly

2×30 = 60 £ Andy

6× 30 = 180 £ Phoebe

30 + 60 + 180 =270 £