Question

me ajudem!!! a)6x+x=14, com x IN b) 7x +1-5x=9 com, x E IR c)x-x/7=-3​

Answer 1

Explicação passo-a-passo:

a)

$6x + x = 14 \\ 7x = 14 \\ x = \frac{14}{7} \\ x = 2$

b)

$7x + 1 - 5x = 9 \\ 2x = 9 - 1 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

c)

$x - \frac{x}{7} = - 3 \\ \frac{x}{1} - \frac{x}{7} = \frac{ - 3}{1} \\ \\ m.m.c. \: de \: 7 \\ \\ 7x - x = - 21 \\ 6x = - 21 \\ x = \frac{ - 21}{6} \\ x = \frac{ - 7}{2}$

Answer 2

Resposta:

Explicação passo-a-passo:

a)6x+x=14, com x IN

7x = 14

x = 14/7

x = 2

b) 7x +1-5x=9 com, x E IR

7x-5x +1 = 9

2x+1= 9

2x = 9-1

2x = 8

x = 8/2

x = 4

c)x-x/7=-3​

MMC = 7

(7x-x)/7 = 7.(-3)/7

6x = -21 (:3)

2x = -7

x = -7/2