7(4x+2)-8(5-3x) help me please

в начале не -49,а -40 -_-

28x+14-40+24x= 52x-26

28x+14-49+24x=52x-2648x-30+28-7x=41x-22x-7-3x+3=x-108-20x-15+20=13-20x10y-20+9y-54 , у=-34-25+15у=16у-48 ,-у=-23 у=2321у-20у=-30+35  у=5у=0