Question

1- Resolva as equações do primeiro grau encontrando o valor X.

a) 6x = 42

b) 3x = 15

c) 2x -2 = 12

d) 2x - 4 = 16

e) 4x + 4 = 20​

Answer 1

Resposta:

Explicação passo-a-passo:

a) 6x = 42

x = 42 / 6

x = 7

b) 3x = 15

x = 15 / 3

x = 5

c) 2x -2 = 12

2x = 12 + 2

2x = 14

x = 14 / 2

x = 7

d) 2x - 4 = 16

2x = 16 + 4

2x = 20

x = 20 / 2

x = 10

e) 4x + 4 = 20​

4x = 20 - 4

4x = 16

x = 16 / 4

x = 4

Answer 2

a) 6x = 42

x = $\frac{42}{6}$

x = 7

b) 3x = 15

x = $\frac{15}{3}$

x = 5

c) 2x -2 = 12

2x = 12 + 2

2x = 14

x = $\frac{14}{2}$

x = 7

d) 2x - 4 = 16

2x = 16 + 4

2x = 20

x = $\frac{20}{2}$

x = 10

e) 4x + 4 = 20​

4x = 20 - 4

4x = 16

x = $\frac{16}{4}$

x = 4