10x-17x+34=7x-26x+28
10х-17х+34=7х-26х+28 10х-17х-7х+26х=28-34 12х=-6 х=-6:12 х=-6/12 х=-1/2
10х-17х-7х+26х=28-34 12х=-6 х=-6/12=-1/2