Question

15:[11-(7×5-9×9:x:3):8+2×4]×3=3 trebuie ca x sa fie egal cu 9 Mulțumesc frumos

Answer 1

[tex]15:[11-(7*5-9*9:x:3):8+2*4]*3=3\\ 15:[11-(7*5-9*9:x:3):8+2*4] = 1\\ 15 = 11-(7*5-9*9:x:3):8+2*4\\ 15 = 11-(7*5-9*9:x:3):8+8\\ 7 = 11-(7*5-9*9:x:3):8\\ 4 = (7*5-9*9:x:3):8\\ 32 = 7*5-9*9:x:3\\ 32 = 35 - 81:x:3\\ 32 = 35 - 27:x\\ 27:x = 3 =\ \textgreater \ x = 9 [/tex]