Question

a) 2/10 = x-4/x =
b) x/2 = x+6/5 =
c)

Answer 1

Olá,

a)

$\frac{2}{10} = \frac{x - 4}{x} \\ \\ 2x = 10x - 40 \\ 2x - 10x = - 40 \\ - 8x = - 40 \\ x = \frac{ - 40}{ - 8} = 5$

b)

$\frac{x}{2} = \frac{x + 6}{5} \\ \\ 5x = 2x + 12 \\ 5x - 2x = 12 \\ 3x = 12 \\ x = 12 \div 3 \\ x = 4$

Espero ter ajudado :-) Boa sorte.

Answer 2

Resposta:

2x=10(x-4)

2x=10x-40

2x-10x=-40

-8x=-40(-1)

8x=40

x=40/8

x=5

b-5x=2(x+6)

5x=2x+12

5x-2x=12

3x=12

x=12/3

x=4