Simplify the following expressions: 7. c + 3/7 * c

Решение:

1. \[ c + \frac{3}{7} c = 1c + \frac{3}{7} c = \left( 1 + \frac{3}{7} \right) c = \left( \frac{7}{7} + \frac{3}{7} \right) c = \frac{7+3}{7} c = \frac{10}{7} c \]

Ответ: \(\frac{10}{7}c\)