Question

me ajudem com essas contas​

Answer 1

Resposta:

x/2 = 8/1 mmc=2 (8×2)

x=16

b) a mesma coisa só q negativo

x= -16

c) 3x/4=9/1 mmc=4 (9×4)

3x=28

x=28/3

x=12

d) 2x/3= 10/1 mmc=3 ( 3x10)

2x= 30

x=30/2

x=15

Answer 2

$\frac{x}{2} = 8 \\ 2 \times \frac{ x}{ 2} = 2 \times 8 \\ x = 2 \times 8 \\ x = 16$

$\frac{x}{2} = - 8 \\ 2 \times \frac{ x}{ 2} = 2 \times ( - 8 )\\ x = 2 \times ( - 8) \\ x = - 16$

$\frac{3x}{4} = 9 \\ \frac{4}{3} \times \frac{3x}{4} = \frac{4}{3} \times 9 \\ \frac{1}{3} \times 3x = \frac{4}{3} \times 9 \\ x = \frac{4}{3} \times 9 \\ x = 4 \times 3 \\ x = 12$

$\frac{2x}{3} = - 10 \\ \frac{3}{2} \times \frac{2x}{3} \times \frac{3}{2} \times ( - 10) \\ \frac{1}{2} \times 2 x = \frac{3}{2} \times ( - 10) \\ x = \frac{3}{2} \times ( - 10) \\ x = - 3 \times 5 \\ x = - 15$