Question

Resolva estas Equações.

a) 5-×+3x=15

b) 4×-×=27

c) 12×-28=5×

d) 6×+9=39

Answer 1

a) 5 - x + 3x = 15

5 + 2x = 15

2x = 15 - 5

2x = 10

x = 10/2

x = 5

b) 4x - x = 27

3x = 27

x = 27/3

x = 9

c) 12x - 28 = 5x

12x - 5x = 28

7x = 28

x = 28/7

x = 4

d) 6x + 9 = 39

6x = 39 - 9

6x = 30

x = 5