Please help and show work,plaese

15m+7(17*13m) = -57+18m    simplify

15m +  7(221m)    = -57 + 18m

15m + 1547m  =  -57 + 18m    

1562m  =   -57  + 18m      subtract 18m from both sides

1544m  =  -57       divide both sides by 1544

m  =  -57 / 1544

-2  =  m

Maybe you just need some coffee, MJ.....!!!!