701.12х-х=-55 11х=-55 х=-5 702.9х-х=24 8х=24 х=3 703.14х-2х=-9 х=-3/4 704.3х-х=-10 х=-5 705.8х=-26 х=-13/4=-3 1/4 706.4х=-12 х=-3 7073х=-12 х=-4 708. 3х+х=8 4х=8 х=2 709 8х=-8 х=-1 710.2х+х=-6 х=-2 711. 3х=9 х=3 712 5х+х=-24 х=-4 713. 12х+х=26 13х=26 х=2 714. 11х=-55 х=-5 715 13х=-42 х--4 716 .2х+7х=36 х=4