-2(3,1x-1)+3(1.2x+1)=-14.5

-2(3.1х-1)+3(1.2х+1)=-14.5                                                                               -6.2х+2+3.6х+3=-14.5                                                                                       -2.6х+5=-14.5                                                                                                  -2.6х=-14.5-5                                                                                                   -2.6х=-19.5                                                                                                      х=-19.5:(-2.6)                                                                                                  х=7.5

-2(3,1x-1)+3(1,2x+1)=-14,5

-6,2x+2+3,6x+3=-14,5

-2,6x=-19,5

x=7,5