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[(5×a+19)×7-2]÷9=34

Răspuns :

[(5a+19)×7-2]=34×9
(5a+19)×7-2=306
(5a+19)×7=306+2
(5a+19)×7=308
5a+19=308:7
5a+19=44
5a=44-19
5a=25
a=5
[(5a+19)×7-2]=34×9
(5a+19)×7-2=306
(5a+19)×7=306+2
(5a+19)×7=308
5a+19=308:7
5a+19=44
5a=44-19
5a=25
a=5