3(1,9х+2,4)=5(0,42х-0,96)  ( 0,4х-2)-(1,5х+1)=2,8-4х

[latex]3(1,9x+2,4)=5(0,42x-0,96) \\ 5,7 x+7,2 = 2,1 x-4,8[/latex] [latex]57 x-21x = -72 - 48 \\ 36x = -120[/latex] [latex]x = -3\frac{1}{3}[/latex] [latex]( 0,4x-2)-(1,5x+1)=2,8-4x \\ 0,4 x-2-1,5 x-1 = 2,8-4x [/latex] [latex]-1,1 x-3 =2,8-4x [/latex] [latex]2,9 x = 5,8 \\ x = 2[/latex]