Question

5*2^(x+3)-4*2^(x-1)=9,5
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Answer 1

5*2^x*8 - 4*2^x*1/2 = 9,5
40*2^x - 2*2^x = 9,5
2^x (40 - 2) = 9,5
2^x *38 = 9,5
2^x = 0,25
2^x = 2^( - 2)
x = - 2

Answer 2

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