Решите уравнения: 3/4x=27 (2+-7)=10 2(x-1.5)+x=6 0.4x-6= -12 x+6=5+4x 13-3(x+1)=4-5x 0.2(3x-5)-0.3(x-1)= -0.7

3/4x=27
х=27÷3/4
х=36

(2+3x)-(4x-7)=10
2+3х-4х+7=10
-х= 10-9
-х=1
х=-1

2(x-1.5)+x=6
2х -3+х=6
3х =6+3
3х =9
х =9÷3
х =3

0.4x-6= -12
0, 4х =6-12
0, 4х =-6
х = -6÷0, 4
х =-15

x+6=5+4x
х-4х =5-6
-3х =-1
х=1/3

13-3(x+1)=4-5x
13-3х -3=4-5x
-3х +5х =4+3-13
2х = -6
х = -6÷2
х =-3

0.2(3x-5)-0.3(x-1)= -0.7
0, 6х -1 -0, 3х+0, 3=-0,7
0, 3 х =0, 7-0, 7
0, 3 х =0
х=0