0,4х-6=-12х+6=5+4х13-3(х+1)=4-5х0,2(3х-5)-0,3(х-1)=-0,7_________________________________4,6а-4в-(-3,86+3,5а)2а-(8-а)+(3а-2)8-6(2х-1 )+12х-2          2

0,4х-6=-12 0,4х = -12 + 6 0,4х = -6 х = -6 : 0,4 х = -15 х+6=5+4х х-4х = 5-6 -3х = -1 3х = 1 х = 1/3 13-3(х+1)=4-5х 13 - 3х - 3 = 4 - 5х -3х + 5х = 4 - 13 + 3 2х = -6 х = -3 0,2(3х-5)-0,3(х-1)=-0,7 0,6х - 1 - 0,3х + 0,3 = -0,7 0,3х = -0,7 + 1 - 0,3 0,3х = 0 х = 0 _________________________________ 4,6а - 4в - ( -3,86 + 3,5а) =4,6а - 4в + 3,86 - 3,5а =  1,1а - 4в + 3,86 2а-(8-а)+(3а-2) = 2а - 8 + а + 3а - 2 = 6а - 10 8 - 6(2х - 1/2)+ 12х - 2 = 8 - 12х + 3 + 12х - 2 = 9           

[latex] 1) 0.4x-6=-12\\0.4x=-12+6\\0.4x=-6\\x=-6/0.4\\x=-15\\\\2) x+6=5+4x\\x-4x=5-6\\-3x=-1\\x= \frac{1}{3} \\ \\ 3) 13-3(x+1)=4-5x\\13-3x-3=4-5x\\ [/latex] [latex]-3x+5x=4-13+3\\2x=-6\\x=-3[/latex] [latex]4) 0.2(3x-5)-0.3(x-1)=-0.7\\0.6x-1=0.3x+0.3=-0.7\\0.3x=-0.7+1-0.3\\0.3x=0\\x=0\\\\5) 4.6a-4b(-0.38+3.5a)=4.6a-4b+3.86-3.5a=1.1a-4b+3.86\\\\6) 2a-(8-a)+(3a-2)=2a-8+a+3a-2=6a-10[/latex] [latex]7) 8-6(2x- \frac{1}{2} )+12x-2=8-6(2x-0.5)+12x-2= \\ =8-12x+3+12x-2=9[/latex]