Question
20% of βmβ added to 80% of βnβ equals 180. If
βnβ is 90 more than βmβ, find the value of (2m β n)Solution
According to the question, 0.2m + 0.8n = 180β¦β¦.. (1) And, n β m = 90β¦β¦. (2) On solving equation (1) and (2), we get m = 90 and n = 180 Therefore, (2m β n) = 180 β 180 = 0
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