Question

Resolver as equações :
a ) 2. ( x +2 )
b) 3. ( x - 1 ) = 24
c ) 4. ( x +2 ) = 2. ( x -5 )

Answer 1

a)

2.(x + 2)

2.x + 2.2

2x + 4

b)

3.(x - 1) = 24

3x - 3 = 24

3x = 24 + 3

3x = 27

x = 27/3

x = 9

c)

4.(x + 2) = 2.(x - 5)

4x + 8 = 2x - 10

4x - 2x = -8 - 10

2x = -18

x = -18/2

x = -9