Question

calcule a b c d na serie 3/a 7/b 5/c 4/d sendo b + c = 60

Answer 1

Boa tarde!

Vamos lá:

• 3/a = 7/b = 5/c = 4/d (1)
• b + c = 60 (2)

• 7/b = 5/c
• 7c = 5b
• c= 5b/ 7

• (2) b + ( 5b/7) = 60
• (7b + 5b)= 60 × 7
• 12b= 60 × 7
• b = ( ( 12 × 5) × 7 )/ 12
• b = 35

• (2) b + c = 60
• 35 + c = 60
• c = 25

• 3/a = 7/b
• 3/a = 7/35
• 3= a/5
• a = 15

• 5/c = 4/d
• 5 / 25= 4/D
• 1 / 5 = 4 / d
• d / 5 = 4
• d= 20

Espero ter ajudado!