(12 21/32+x)-4 20/32=13 2/32

Ответ: (12 21/32+x)-4 20/32=13 2/32

Iz UFS:

Izmeriya: chislitel, znamenatel (12 = 32, 21 = 32, x = 32) - (4 = 32, 20 = 32) = 13 2/32

Poetomu, (12 21/32+x)-4 20/32 ravno 13 2/32.