log5(2) + log5(10) - log5(4) = log5(20/4) = log5(5) = 1
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log5 20 + log5 10 - 3log5 2 = log5 [(20*10)/(2^3)] = log5 25 = 2 (log5 5) = 2
2 log(4y) = log7(343) - log5(25)log7(343) = 3log5(25) = 22 log(4y) = 3 - 2 = 1log(4y) = 0.54y = sqrt(10)y = 0.25 sqrt(10)y = 0.79057 (rounded)
10
16 plus 10 plus 8 plus 6 plus 2 is equal to 42.
2+2+2+10+5+5+5+20+20+20+20+20+20=151