Question

Решите уравнение:
X : 3 + x = 28

Answer 1

x:3+x=28
1/3x+x=28
4/3x=28
x=21

Answer 2

$x \div 3 + x = 28 \\ \frac{1}{3} x + x = 28 \\ \frac{4}{3} x = 28 \\ x = 21$