Question

Calcule o valor de x

a) 2x + 5x= 6+2

b)5x - 1= -3x + 1

Answer 1

Resposta:

A) X= 8/7

B) X= 1/4

Explicação passo-a-passo:

A) 2x + 5x= 6+2

7x=8

X= 8/7

B) 5x - 1= -3x + 1

5x+3x=1+1

8x=2

X= 1/4

Answer 2

a)

$2x + 5x = 6 + 2 \\ 7x = 8 \\ x = \frac{8}{7} \\ x = 1.14$

b)

$5x - 1 = - 3x + 1 \\ 5x + 3x = 1 + 1 \\ 8x = 2 \\ x = \frac{2}{8} \\ \: \: \: \: x = \frac{1}{4} \: \: \: \: \: ou \: \: \: x = 0.25$