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StayT
@StayT
February 2022
2
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Чет не понимаю:
№1438
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nikka80
1пачка-2.5*х
2 пачка-х
х-5+(2.5х+5)/3
2.5*х+5=3(х-5)=3х-15
-0.5х=-20
х=40-тетрадей во второй пачке
40*2.5=100-тетрадей в первой пачке
0 votes
Thanks 1
AlinaPan1
2,5х+5=3*(х-5)
2,5х+5=3х-15
2,5х-3х=-15-5
-0,5х=-20
х=40-во 2 пачке.
2,5х=2,5*40=100-в 1 пачке.
0 votes
Thanks 1
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Answers & Comments
2 пачка-х
х-5+(2.5х+5)/3
2.5*х+5=3(х-5)=3х-15
-0.5х=-20
х=40-тетрадей во второй пачке
40*2.5=100-тетрадей в первой пачке
2,5х+5=3х-15
2,5х-3х=-15-5
-0,5х=-20
х=40-во 2 пачке.
2,5х=2,5*40=100-в 1 пачке.