Question

Решите уравнение Х/3+х/7 =5

Answer 1

 х/3+х/7 =5
3х+7х=105
10х=105
х=10,5

Answer 2

$\frac{x}{3} + \frac{x}{7} =5 \\ 7x+3x=5*3*7 \\ 10x=105 \\ x= \frac{105}{10} \\ x= 10,5$