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Kssjhn
@Kssjhn
April 2023
1
24
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Розв'язати рівняння:
1) 7 - 2х = 3х - 18
2) 3 (х - 2) = х + 2
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Answers & Comments
leyan130408
7 - 2х = 3х - 18
-2х - 3х = -7 - 18
-5х = -25
5х = 25
х = 25 : 5
х = 5
1 votes
Thanks 1
leyan130408
это 1
leyan130408
(3-x)2-x2=-15
9-6х+х²-х²=-15 (х² сокращаются)
9-6х=-15
-6х=-15-9
-6х=-24
х=4
Ответ:4
это 2
Kssjhn
Спасибо большое
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Answers & Comments
-2х - 3х = -7 - 18
-5х = -25
5х = 25
х = 25 : 5
х = 5
9-6х+х²-х²=-15 (х² сокращаются)
9-6х=-15
-6х=-15-9
-6х=-24
х=4
Ответ:4
это 2