Решить уравнение х+4= -1 -9+х= -5 х-(-4)=0
1) х+4=-1 х=-4-1 х=-5 2)-9+х=-5 х=-5+9 х=4 3)х-(-4)=0 х+4=0 х=-4
1) х=-1-4 х=-5 20Х=-5+9 Х=4 3) Х+4=0 Х=0-4 Х=-4