Ответ:
x + 4x + x + 4x = 50
10x = 50
x = 5
сторона a = 5см, сторона b = 5×4=20 см
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Ответ:
x + 4x + x + 4x = 50
10x = 50
x = 5
сторона a = 5см, сторона b = 5×4=20 см