Question

como calcular 2+1/x=7/x ?

Answer 1

$2 + \frac{1}{x} = \frac{7}{x} \\ \frac{2x + 1}{x} = \frac{7}{x} \\ 2x + 1 = \frac{7}{x} \times x \\ 2x + 1 = 7 \\ 2x = 7 - 1 \\ 2x = 6 \\ x = \frac{6}{2} \\ x = 3$