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(30+4xj-8):6=7 cu cât este egal j?

Răspuns :

Vaxxro
(30+4xj-8):6=7
30+4xj-8=42
4xj-8=12
4xj=20
j=20:4
j=5
(30+4*j-8):6=7                                                                                             30+4*j-8=7*6                                                                                               30+4*j-8=42                                                                                                30+4*j=42+8                                                                                               30+4*j=50                                                                                                    4*j=50-30
4*j=20
j=20:4
j=5
                                                                                              

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