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Question
Solve: `("3a" - 2)/7 - ("a" - 2)/4 = 2`
Solution
`("3a" - 2)/7 - ("a" - 2)/4 = 2`
⇒ `(12"a" - 8 - 7"a" + 14)/28 = 2`
⇒ 12a - 8 - 7a + 14 = 2 × 28
⇒ 12a - 8 - 7a + 14 = 56
⇒ 12a - 7a + 14 - 8 = 56
⇒ 5a + 6 = 56
⇒ 5a = 56 - 6 = 50
⇒ a = `50/5 = 10`
∴ a = 10
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