-1.4(х-6)=7(4х+1.2)
-1.4(x-6)=7(4x+1.2)
-1.4x+8.4=28x+8.4
8.4-8.4=28x+1.4x
0=29.4x x=0
-1.4х+8.4=28х+8,4 -1,4х-28х=0 х=0