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zarinai
@zarinai
July 2022
1
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Решите уравнения:
1). 0,4(х-3)-1,6=5(0,1х-0,5)
2) 1,5(2х-5)+2х=5(0,5х-1,5)-10
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пимочка
1). 0,4(х-3)-1,6=5(0,1х-0,5)
0,4х-1,2-1,6=0,5х-2,5
0,4х-2,8=0,5х-2,5
0,4х-0,5х=-2,5+2,8
-0,1х=0,3
х=0,3:(-0,1)
х=-3
2) 1,5(2х-5)+2х=5(0,5х-1,5)-10
3х-7,5+2х=2,5х-7,5-10
5х-7,5=2,5х-17,5
5х-2,5х=-17,5+7,5
2,5х=-10
х=-10:2,5
х=-4
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Answers & Comments
0,4х-1,2-1,6=0,5х-2,5
0,4х-2,8=0,5х-2,5
0,4х-0,5х=-2,5+2,8
-0,1х=0,3
х=0,3:(-0,1)
х=-3
2) 1,5(2х-5)+2х=5(0,5х-1,5)-10
3х-7,5+2х=2,5х-7,5-10
5х-7,5=2,5х-17,5
5х-2,5х=-17,5+7,5
2,5х=-10
х=-10:2,5
х=-4