Question

III ) Equações do 1º grau .
A ) X/2 + 7 = 12 B ) X/7 – 3 = 4
C ) X/20 + 15 = 20 D )X/3 – 4 = 2

Answer 1

Oie, Td Bom?!

A)

x/2 + 7 = 12

x + 14 = 24

x = 24 - 14

x = 10

B)

x/7 - 3 = 4

x - 21 = 28

x = 28 + 21

x = 49

C)

x/20 + 15 = 20

x + 300 = 400

x = 400 - 300

x = 100

D)

x/3 - 4 = 2

x - 12 = 6

x = 6 + 12

x = 18

Att. Makaveli1996