(3 + 4 + 4 + x) - (2 + 4 + 1 + x) = 11 - 7 = 4
x - наклонная сторона
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(3 + 4 + 4 + x) - (2 + 4 + 1 + x) = 11 - 7 = 4
x - наклонная сторона