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Question
Find x if `5 x/5 xx 3 3/4` = 21
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Solution
`5 x/5 xx 3 3/4` = 21
`(25 + x)/5 xx 15/4` = 21
`(25 + x)/5 = 21 ÷ 15/4`
`(25 + x)/5 = 21 xx 4/15`
`(25 + x)/5 = 28/5`
25 + x = `(28 xx 5)/5`
25 + x = 28
x = 28 – 25
x = 3
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