4.5-1.5(6m+2)=6

4.5-1.5(6m+2)=6    multiply through by 10 to clear the decimals

45 - 15(6m + 2)  = 60    subtract 45 from each side

-15(6m + 2)  = 15     divide both sides by -15

6m + 2  = -1      subtract 2 from both sides

6m = -3     divide both sides by 6

m = -3/6 = -1/2 

-5/2(w-1)=15