Tolongin dong beberapa soal gpp kok besok mau di kumpulin

1.1/2x+(1/2x-6)+1/3(1/2x-7)=50
1/2x+1/2x-6+1/6x-7/3=50
2/2x+1/6x-6-7/3=50
X+1/6x-7/3=50+6
7/6x-7/3=56
7/6x=56+7/3
7/6x=175/3
X=175/3*6/7
X=50