Решите уравнения: 1) 2-5х=х+14 2) 2-0,7х=0,4-0,3х 3) 1,7-0,6х=0,3-0,4х. Created by olegkozlov1307. matematika-ru

Решите уравнения: 1) 2-5х=х+14 2) 2-0,7х=0,4-0,3х 3) 1,7-0,6х=0,3-0,4х...

SergejGolizyn
$2 - 5x = x + 14 = \\ - 6x = 12 \\ x = - 2 \\ \\ 2 - 0.7x = 0.4 - 0.3x \\ - 0.4x = - 1.6 \\ x = 4 \\ \\ 1.7 - 0.6x = 0.3 - 0.4x \\ - 0.2x = - 1.4 \\ x = 7$

Laaaaa14 2-5х=х+14;
-5х-х=-2+14;
-6х=12
х=12:(-6);
х=-2

2-0,7х=0,4-0.3х;
-0.7х+0.3=-2+0.4;
-0.4х=1.6
х=1.6:0,4
х=16:4
х=4

1.7-0.6х=0.3-0.4х
-0.6х+0.4х=0.3-1.7
-0.2х=-1.4
х=-1.4:(-0.2)
х=-14:(-2)
х=7

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