Question

решите уравнение:
x/3+x/5=8​

Answer 1

$\frac{x}{3} + \frac{x}{5} = 8 \\ 15 \times \frac{x}{3} + 15 \times \frac{x}{5} = 15 \times 8 \\ 5x + 3x = 120 \\ 8x = 120 \\ x = \frac{120}{8} \\ x = 15$