7 /18X+ 0,3 X + 112=X

7:18x+0.3x+112=x. 7:18x+3:10x+112=x. 35:90x+27:90x+112. 62:90x-x=-112. 28:90x=112. 28x=112•90. 28x=10080. x=360

7 /18X+ 0,3 X + 112=X

7 /18X+ 0,3 X + 112-X =0

х(7/18+3/10-1)=-112

х(35/90+27/90-90/90)=-112

х(- 28/90)=-112

х=-112:(-28/90)

х=112·90/28

х=360