3 * х = 57
x = 19
х ÷ 68 = 4
x = 272
540 ÷ х = 90
540 = 90x
90x = 540
x = 540 ÷ 90
x = 6
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3 * х = 57
x = 19
х ÷ 68 = 4
x = 272
540 ÷ х = 90
540 = 90x
90x = 540
x = 540 ÷ 90
x = 6