log5 20 + log5 10 - 3log5 2
= log5 [(20*10)/(2^3)]
= log5 25
= 2 (log5 5)
= 2
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log5(2) + log5(10) - log5(4) = log5(20/4) = log5(5) = 1
1.268293446
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)
8x + -2 = 10 8x = 12 x = 1.5
10+r = 2r Subtract r from both sides:- r = 10