7x=-1,4 1/6x=-2/3 -3/4x=-9 2/3x=-8.
1) 7x=-1,4 х=-1,4/7 х=-0,2 2) 1/6x=-2/3 х=-2/3*6 х=-4 3) -3/4x=-9 х=-9*(-4/3) х=12 4) 2/3x=-8 х=-8*3/2 х=-12