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Question
Solve the linear equation:
`n/2 - (3n)/4 + (5n)/6 = 21`
Solution
`n/2 - (3n)/4 + (5n)/6 = 21`
`(6n - 3(3n) + 2(5n))/12 = 21`
`(6n - 9n + 10 n)/12 = 21`
`(6n + n)/12 = 21`
`(7n)/12 = 12`
7n = 21 × 12
`n = (21 xx 12)/7`
n = 36
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