Question

calcule:

a) 8 x - 9 =2x + 11

b) x + 9 = 18

c) x - 1 = -8

d) 10 - 4x = 9 - 2x

Answer 1

a)

8x - 9= 2x + 11

8x - 2x= 11 + 9

6x= 20

x= 20/6

x= 10/3

b)

x + 9= 18

x= 18 - 9

x= 9

c)

x - 1= - 8

x= - 8 + 1

x= - 7

d)

10 - 4x= 9 - 2x

- 4x + 2x= 9 - 10

- 2x= - 1 >>.(-1)

2x= 1

x= 1/2