Решите уравнение: а) 4*25*x=800; б) y*5*20=500; в) 21*8*p=168; г) m*3*33=990

$4 \times 25 \times x = 800 \\ 100x = 800 \\ x = 800 \div 100 \\ x = 8$
▪б)

$y \times 5 \times 20 = 500 \\ 100y = 500 \\ y = 500 \div 100 \\ y = 5$
▪в)

$21 \times 8 \times p = 168 \\ 168p = 168 \: \: \: \: \: | \div 168 \\ p= 1$
▪г)

$m \times 3 \times 33 = 990 \\ 99m = 990 \: \: \: \: \: | \div 99 \\ m = 10$