Question

a+b+c=56
a:b=2 rest 7
b:c=3 rest 3
a=? b=? c=?​

Answer 1

Răspuns:

a+b+c=56

a:b=2 rest 7=>a=2b+7=>a=2(3c+3)+7=>a=6c+6+7=>a=6c+13

b:c=3 rest 3=>b=3c+3

6c+13+3c+3+c=56

10c=56-16

c=40:10

c=4

a=6·4+13=>a=37

b=3·4+3=>b=15

Answer 2

a + b + c = 56

a = 2b + 7

b = 3c + 3 => c = (b - 3)/3

2b + 7 + b + (b - 3)/3 = 56

6b + 21 + 3b + b - 3 = 168

10b = 168 - 21 + 3

10b = 150

b = 15

a = 37

c = 4