Question

(18-x)-7(2x-4)=5x+20

Answer 1

Пошаговое объяснение:

$18 - x - 14x + 28 = 5x + 20 \\ - 15x + 46 = 5x + 20 \\ 5x + 15x = 46 - 20 \\ 20x = 26 \\ x = \frac{26}{20} = \frac{13}{10} = 1.3$