Question

gente me ajudem nessa tarefa por favor​

Answer 1

Resposta:

1)

a + b = 90

a/8 = b/10 = 90

a + b / 8 + 10 = 90/18 = 5

a/8 = 5

a = 5 . 8

a = 40

b/10 = 5

b = 5 . 10

b = 50

2)

a + b + c = 580

a/7 = b/10 = c/12 = 580

a + b + c / 7 + 10 + 12 = 580/29 = 20

a/7 = 20

a = 20 . 7

a = 140

b/10 = 20

b = 20 . 10

b = 200

c/12 = 20

c = 20 . 12

c = 240

3)

a + b = 1200

a/5 = b/7 = 1200

a + b / 5 + 7 = 1200/12 = 100

a/5 = 100

a = 5 . 100

a = R$ 500,00

b/7 = 100

b = 100 . 7

b = R$ 700,00

4)

a + b + c = 5500

a/2 = b/3 = c/5 = 5500

a + b + c / 2 + 3 + 5 = 5500/10 = 550

a/2 = 550

a = 550/2

a = R$ 1100,00