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Alex11567
@Alex11567
August 2022
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Решите уравнения.
1) 1/2x=20
2) 3x-10=x+6
3) 5x-0,8=2x+8,2
4) 2x-(6x-57)=9
5) 5x-(7x-43)=9
6) 80-2(x-40)=4(x-50)
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supervika307
1) х=20:1/2
х=20/1*2/1
х=40
2)3х-х=6+10
2х=16
х=16:2
х=8
3)5х-2х=8,2+0,2
3х=9
х=9:3
х=3
4)2х-6х-57=9
2х-6х=9+57
-4х=66
х=66:(-4)
х=-16,5
5)5х-7х-43=9
5х-7х=9+43
-2х=52
х=52:(-2)
х=-26
6)80-2х+80=4х-250
-2х-4х=-250-80-80
-6х=-420
х=-420:(-6)
х=70
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Answers & Comments
х=20/1*2/1
х=40
2)3х-х=6+10
2х=16
х=16:2
х=8
3)5х-2х=8,2+0,2
3х=9
х=9:3
х=3
4)2х-6х-57=9
2х-6х=9+57
-4х=66
х=66:(-4)
х=-16,5
5)5х-7х-43=9
5х-7х=9+43
-2х=52
х=52:(-2)
х=-26
6)80-2х+80=4х-250
-2х-4х=-250-80-80
-6х=-420
х=-420:(-6)
х=70