Question

Daca a supra b=7 si b supra c = 5 atunci a supra c =? ...Dau coroana e urgent

Answer 1

Ai rezolvarea in poza

Answer 2

Răspuns:

Explicație pas cu pas:

a/b = 7   si  b/c = 5

a/c = ?

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a/b = 7 =>    b = a/7

b/c = 5

( a/7) : c = 5

(a/7 ) × 1/c = 5 =>   a/7c = 5 =>   a/c = 7 × 5 => a/c = 35

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• sau:

a/b = 7 =>   a = 7 b

b/c = 5 =>   c = b/5

=> a/c = 7b/(b/5) = 7b × 5/b =>   a/c = 35b/b =>   a/c = 35