X = (3 - 10 1/10 : 40 2/5) : 20/33 - 3 3/4

Question

X = (3 - 10 1/10 : 40 2/5) : 20/33 - 3 3/4

Answer 1

X = (3 - 10 1/10 ÷ 40 2/5) ÷ 20/33 - 3 3/4
х = (3 - 101/10 × 5/202) × 33/20 - 15/4
х = (3 - 505/2020) × 33/20 - 15/4
х = (3 - 1/4) × 33/20 - 15/4
х = (2 4/4 - 1/4) × 33/20 - 15/4
х = 2 3/4 × 33/20 - 15/4
х = 11/4 × 33/20 - 15/4
х = 363/80 - 15/4
х = 363 - 15×20/80 = 363-300/80 = 63/80
х = 63/80