Решите уравнение 9х-5-4(х-5)=0
9х-5-4х+20=0
5х+15=0
5х=-15
х=-3
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9х-5-4х+20=0
5х+15=0
5х=-15
х=-3
9х-5-4х+20=0
5х=-15
х=-3