-1,5a*(-3b)= 5m-4n-6m+19n= (c-0,6)-(-c+0,8)= -2(x-4)+6(x+2)=

-1,5a*(-3b)= 4,5 ав5m-4n-6m+19n=-м+15н(c-0,6)-(-c+0,8)=c-0,6+c-0,8=2с-1,4-2(x-4)+6(x+2)= -2х+8+6х+12=4х+20=4(х+5)