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Question
Solve: 0.6a +0.2a = 0.4 a + 8
Solution
0.6a +0.2a = 0.4 a + 8
⇒ `6/10"a" + 2/10"a" = 4/10"a" + 8/1`
⇒`("6a + 2a")/10 = "4a + 80"`
⇒ 6a + 2a = 4a + 80
⇒ 6a + 2a - 4a = 80
⇒ 4a = 80
⇒ a = `80/4 = 20`
∴ a = 20
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