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Mathematics, 12.03.2021 21:30 ciya12

8. Suppose a varies directly as b, and a = 7 when b = 2. Find b when a = 21.
(PLEASE HELP ME)

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8. Suppose a varies directly as b, and a = 7 when b = 2. Find b when a = 21.
(PLEASE HELP ME)...
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