Реши уравнения 79-x=46-9 , 45+y=100 -15, 13 - a=21-12, 12 + c=90-70

79-x=46-9x=46-9=37x=79-37=42x=4245+y=100y=100-45=55y=5513-a=21-12a=21-12=9a=13-9=4a=412+c=90-70c=90-70=20с=20-12=8с=8

1) 79-x=46-979-x=37x = 37-79x = -422)45+y=100-1545+y=85y=85-45y=403)13-a=21-1213-a=9a=9-13a=-44)12+c=90-7012+c=20c=20-12c=8