Question

Ache o valor desconhecido
A) x 9 12
B) 15 30 x
C) 12 x 8
D) 60 y 80
E) y 40 10
F) 6 x 8
G) 10 h 8

Answer 1

A) 6 9 12

B) 15 30 45

C) 12 10 8

D) 60 70 80

E) 70 40 10

F) 6 7 8

G) 10 9 8

Answer 2

Vamos lá

Ache o valor desconhecido  

A) x 9 12

9 - x = 12 - 9

x = 9 - 3 = 6

6 9 12

B) 15 30 x  

30 - 15 = x - 30

x = 15 + 30 = 45

15 30 45

C) 12 x 8

x - 12 = 8 - x

2x = 20. x = 10

12 10 8

D) 60 y 80

y - 60 = 80 - y

2y = 140, y = 70

60. 70, 80

E) y 40 10  

40 - y = 10 - 40

y = 40 + 30 = 70

70 40 10

F) 6 x 8  

x - 6 = 8 - x

2x = 14, x = 7

6 7 8

G) 10 h 8

h - 10 = 8 - h

2h = 18, h = 9

10 9 8