Question

2) Encontre o valor de "x"
a) 2x +2 = 4
b) 5x +2 =12
c) 4+x+ 5 = 20
d) 2+x=7​

Answer 1

Resposta:

a) 1

b) 2

c) 11

d ) 5

Explicação passo-a-passo:

a)

2x + 2 = 4

2x = 4 - 2

2x = 2

x = 2 / 2

x = 1

b)

5x + 2 = 12

5x = 12 - 2

5x = 10

x = 10 / 5

x = 2

c)

4 + x + 5 = 20

x = 20 - 4 - 5

x = 11

d)

2 + x = 7

x = 7 - 2

x = 5

Answer 2

A)X=1

$2x + 2 = 4 \\ 2x = 4 - 2 \\ 2x = 2 \\ \frac{2}{2x} \\ x = 1$

B)X=2

$5x + 2 = 12 \\ 5x = 12 - 2 \\ 5x = 10 \\ \frac{10}{5x} \\ x = 2$

C)X=11

$4 + x + 5 = 20 \\ x = 20 - 4 - 5 \\ x = 11$

D)X=5

$2 + x = 7 \\ x = 7 - 2 \\ x = 5$

Espero ter ajudado!!!

-Thierry