1). 10-3+21x=-4x-8 21x+4x=-7-8 25x=-15 x=-15/25=-3/5 2) -2=-9+4x+2 -2+9-2=4x x=5/4=1цел1/4 3) 2x/14+7x/14=36/14 9x/14=36/14 x=4 4). 11x/88+8x/88=-80/88 19x/88=-80/88 19x=-80 x=-80/19