Question

Aflați valoarea lui x din 15: [11-(7×5-9×9:x:3):8+2×4]×3=3

Answer 1

15:[11-(35-81:x:3):8+8]=3:3
15:[11-(35-27:x):8+8]=1
11-(35-27:x):8+8=15
(35-27:x):8=11+8-15
(35-27:x):8=4
35-27:x=32
27:x=35-32
27:x=3
x=27:3
x=9