Question

Resolva as Equações abaixo: A) × - 3= 9
B) × + 5=20- 4×
C) 3×-×=8
D) 18× - 43 = 65​

Answer 1

a)

x - 3 = 9

x = 9 + 3

x = 12

b)

x + 5 = 20 - 4x

x + 4x = 20 - 5

5x = 15

x = 15/5

x = 3

c)

3x - x = 8

2x = 8

x = 8/2

x = 4

d)

18x - 43 = 65

18x = 65 + 43

18x = 108

x = 108/18

x = 6