Formula calculation: 42 is 1 / 6 more than bracket
42 is one sixth more than bracket
Let 42 be one sixth more than x, then:
(42-x)/x = 1/6
42 - x = x/6
42 = x/6 + x
42 = 7x/6
6 = x/6
x = 36
Fill in 36 in brackets
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