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a) [5·(5x-5)-120]·5-25=125
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Răspuns :

[(25x-25)-120]*5=125+25
(25x-25)-120=150:5
25x-25=30+120
25x=150+25
x=175:25
x=7
Giigii
[5·(5x-5)-120]·5=125+25》150 ; 5·(5x-5)-120=150:5》30; 5·(5x-5)=30+120》150;5x-5=150:5》30; 5x=30+5》35; x=35:5; x=7

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