Реши уравнение- a+4=9 .10-b=3 . c+30=50
а+4=9 10-b=3 c+30=50
a=9-4 b=10-3 c=50-30
а=5 b=7 c=20
а+4=9
а=9-4
а=5
10-b=3
b=10-3
b=7
с+30=50
с=50-30
с=20
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а+4=9 10-b=3 c+30=50
a=9-4 b=10-3 c=50-30
а=5 b=7 c=20
а+4=9
а=9-4
а=5
10-b=3
b=10-3
b=7
с+30=50
с=50-30
с=20