2)
5х+12=8х+30
5х+12-8х-30=0
-3х-18=0
-3х=18
х=18/(-3)
х=-6
4)
6х-19=-х-10
6х-19+х+10=0
7х-9=0
7х=9
х=9/7
6)
0,1х+9=0,2х-4
0,1х+9-0,2х+4=0
-0,1х+13=0
-0,1х=-13
х=-13/(-0,1)
х=130.
5x + 12 = 8x + 30;
5x - 8x = -12 + 30;
-3x = 18;
x = 18 : (-3);
x= -6
6x - 19 = -x - 10;
6x + x = 19 - 10;
7x = 9;
x= 9/7
0,1x + 9 = 0,2 x - 4;
0,1x-0,2x=-9-4;
-0,1x=-13;
x=130
2)
5х+12=8х+30
5х+12-8х-30=0
-3х-18=0
-3х=18
х=18/(-3)
х=-6
4)
6х-19=-х-10
6х-19+х+10=0
7х-9=0
7х=9
х=9/7
6)
0,1х+9=0,2х-4
0,1х+9-0,2х+4=0
-0,1х+13=0
-0,1х=-13
х=-13/(-0,1)
х=130.
5x + 12 = 8x + 30;
5x - 8x = -12 + 30;
-3x = 18;
x = 18 : (-3);
x= -6
6x - 19 = -x - 10;
6x + x = 19 - 10;
7x = 9;
x= 9/7
0,1x + 9 = 0,2 x - 4;
0,1x-0,2x=-9-4;
-0,1x=-13;
x=130