Question

determine o valor de x?
(a)2x+10=2
(b)3x+5=18
(c)5x-3x=0
(d)4x=1600
(e)2(3-x)=6
(f)3x-5x=15​

Answer 1

Oi....

Resolução:

a)

2x + 10 = 2

2x = 2 - 10

2x = - 8

x = - 8/2

x = - 4

b)

3x + 5 = 18

3x = 18 - 5

3x = 13

x = 13/3

c)

5x - 3x = 0

2x = 0

x = 0/2

x = 0

d)

4x = 1600

x = 1600/4

x = 400

e)

2(3 - x) = 6

6 - 2x = 6

- 2x = 6 - 6

- 2x = 0 ⇒(- 1)

2x = 0

x = 0/2

x = 0

f)

3x - 5x = 15

- 2x = 15⇒(- 1)

2x = - 15

x  - 15/2

Bons estudos.