1/25-1/100х=0 -1/100х=-1/25 х=1/25:1/100 х=4 1/75+1/25х=0 1/25х=-1/75 х=-1/75:1/25 х=-1/3 1/8-1/64х=0 -1/64х= -1/8 х=-1/8 :(-1/64) х=8 1/30+1/90х=0 1/90х=-1/30 х=-1/30 :1/90 х=3 212.1) 13х-169+196х-28=33х-121+28+10х-21 13х+196х-33х-10х=169+28-121+28-21 166х=83 х=1/2 2) и т.д. и т.п