Question

X+5 4x
-------- = --------
3 7

Answer 1

Здравствуйте!

Ответ:

x=7

Объяснение:

$\frac{x + 5}{3} = \frac{4x}{7} | \times 21 \\ \\ \frac{21(x + 5)}{3} = \frac{21 \times 4x}{7} \\ \\ 7(x + 5) = 3 \times 4x \\ \\ 7x + 35 = 12x \\ \\ 35 = 12x - 7x \\ \\ 5x = 35 \\ \\ x = 7$