Toán Lớp 6: 2^3 : 2^(x+5) . 4^(x-1) = 64^6
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Toán Lớp 6: 2^3 : 2^(x+5) . 4^(x-1) = 64^6
Comments ( 2 )
=>2^3 :2^(x+5) . (2^2)^(x-1)=(2^6)^6
=>2^3 :2^(x+5) . 2^(2.(x-1))=2^(6.6)
=>2^3 :2^(x+5) . 2^(2x-2)=2^36
=>2^(3-x-5 +2x-2)=2^36
=>2^(3-5-2-x+2x)=2^36
=>2^(-4+x)=2^36
=>x-4=36
=>x=36+4
=>x=40
Vậy x=40