Question

решите уравнения:1/6x+1,5=x ; 1/x+2=0,9/5,4 ; 5x+2=18-3x ; 2/3x+0,5= -x

Answer 1

1/6x+1,5=x            1/x+2=0,9/5,4
1/6x-6/6x=-1,5       1/x+2=9/10: 54/10
-5/6x=-3/2              1/x+2=1/6
x=-3/2:(-5/6)           1/x=1/6-12/6
x=9/5                     1/x=-11/6
x=1,8                      x=-1:(-11/6)
                             x=-6/11

5х+2=18-3х              2/3x+0,5=-x
5х+3х=18-2              2/3x+3/3x=-0,5
8х=16                      5/3x=-0,5
х=16:8                     x=-0,5:5/3
х=2                         x=-0,3