2x-0.8*2.6=3.08-2x 2.4×0.2x=0.5x-2.4 5(0.2x-2.5)=2.1x2x-2.08=3.08-2x 0.48x=0.5x-2.4 x-12.5=2.1x4x=5.16 0.48x-0.5x=-2.4 x-2.1x=12.5x =1.29 -0.02x=-2.4 -1.1x=12.5x=120 x=-125_11