3 1/2 • (2/3x+4/7)=2 1/3
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Ответил Inf777
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3 1/2 * 2/3х + 3 1/2 * 4/7 = 2 1/3
7/2 * 2/3х + 7/2 * 4/7 = 2 1/3
7/3х + 2 = 2 1/3
7/3х = 2 1/3 - 2
7/3х = 1/3
х = 1/3 : 7/3
х = 1/7
7/2 * 2/3х + 7/2 * 4/7 = 2 1/3
7/3х + 2 = 2 1/3
7/3х = 2 1/3 - 2
7/3х = 1/3
х = 1/3 : 7/3
х = 1/7
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