Question

реши уравнения 10-(x:9)+15=20​

Answer 1

Ответ:

$10 - (x \div 9) + 15 = 20\\10 - (x \div 9) = 20 - 15 \\ 10 - (x \div 9) = 5 \\ x \div 9 = 10 - 5 \\ x \div 9 = 5 \\ x = 9 \times 5 \\ x = 45$