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)
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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Answers & Comments
х = 1/40
2) 2х = 16
х= 8
3) 3х = 9
х=3
4) 2х-6х+57=9
-4х=9-57=-48
х= 12
5) 5х-7х+43=9
-2х = 9-43=-34
х= 17
6) 80-2х+80=4х-200
-2х-4х=-200-160
-6х = -360
х= 60