Question
20% of ‘x’ and 40% of ‘y’ together make 138. If
‘y’ is 36 more than ‘x’, then find the value of (2x – y).Solution
ATQ,
Given: 0.2x+0.4y = 138 y = x+36 Substitute: 0.2x+0.4(x+36) = 138 ⇒ 0.2x+0.4x+14.4 = 138 ⇒ 0.6x = 123.6 ⇒x = 206 ⇒ y = x + 36 = 242 So, 2x−y = 2x − y = 2(206)−242 = 412 − 242 = 170
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