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9×[10+3×X)÷4-9]-8=1















Răspuns :

Răspuns:

9×[(10+3*X):4-9]=9|:9

(10+3*X):4-9=1|+9

(10+3*X):4=10|*4

10+3*X=40|-10

3*X=30|:3

X=10