Ответ учителя по предмету Математика
коля а. валя в петя с
с=а/2. с=2в
а+в+с=14
а=2с. в=с/2
2с+с+с/2=14 обе сторону умножим на 2.то получиться
4с+2с+с=28
7с=28
с=28÷7
с=4
а=2с=2×4=8
в=с/2=4/2=2
ответ:петя 4.коля 8.валя 2
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