Question

Решил уравнения и сделай проверку 5•(810: 9-b•3)=40•8-5

Answer 1

5•(810: 9-b•3)=40•8-5
5 * (90 - 3b) = 315
90 - 3b = 315 : 5
90 - 3b = 63
3b = 90 - 63
3b = 27
b = 27 : 3
b = 9
ПРОВЕРКА:
5 * (810 : 9 - 9 * 3) = 40 * 8 - 5
5 * (90 - 27) = 315
5 * 63 = 315
315 = 315