1 ст. - х,
2 ст. - (х + 2),
3 ст. - 2х,
х + х + 2 + 2х = 22,
4х = 22 - 2,
4х = 20,
х = 5 см - 1 сторона,
х+2 = 5+2 = 7 см - 2 сторона,
2х = 2*5 = 10 см - 3 сторона
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1 ст. - х,
2 ст. - (х + 2),
3 ст. - 2х,
х + х + 2 + 2х = 22,
4х = 22 - 2,
4х = 20,
х = 5 см - 1 сторона,
х+2 = 5+2 = 7 см - 2 сторона,
2х = 2*5 = 10 см - 3 сторона