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yuradex [85]
3 years ago
6

Ralph is 3 times as old as Sara. In 6 years, Ralph will be only twice as old as Sara will be then. Find Ralph's age now.

Mathematics
1 answer:
vovikov84 [41]3 years ago
6 0
R=3*S
in 6 years ⇒R+6=2*(S+6)
3*S+6=2*S+2*6
3S+6=2S+12
3S-2S=12-6
S=6 
R=3*6=18 ( Ralph 's age now)

in 6 years Ralph's age will be 3*x+6

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Fazendo a classica regra de 3, podemos chegar no volume desejado:

(atentar que 500mg = 0,5g)

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     1    ---------   2

    0,5  ---------  X    

1 . X = 0,5 . 2

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