tìm x: 32-2.(5+x)=6
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3/2+5/4+9/8/+17/16+33/32-6+x-1/x+1=31/32-2/2015
=(1+1/2)+(1+1/4)+(1+1/8)+(1+1/16)+(1+1/32-6+x-1/x+1=31/32-2/2015
=(1/2+1/4+1/8+1/16+1/32)+(1+1+1+1+1)-6+x-1/x+1=31/32-2/2015
=31/32+5-6+x-1/x+1=31/32-2/2015
=5-6+x-1/x+1=31/32-2/2015-31/32
=-1+x-1/x+1=-2/2015
=x-1/x+1=-2/2015- -1
=x-1/x+1=2013/2015
=>x=2014
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\(\frac{2^{4-x}}{16^5}=32^6\)
\(\Rightarrow\frac{2^{4-x}}{\left(2^4\right)^5}=\left(2^5\right)^6\)
\(\Rightarrow\frac{2^{4-x}}{2^{20}}=2^{30}\)
\(\Rightarrow2^{4-x}=2^{30}.2^{20}\)
\(\Rightarrow2^{4-x}=2^{50}\)
\(\Rightarrow4-x=50\)
\(\Rightarrow x=-46\)
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x + 5 x 2 - ( 32 + 16 x 3 : 6 - 15 ) = 0
x + 5 x 2 - 25 = 0
x + 5 x 2 = 0 + 25
x + 5 x 2 = 25
x + 10 = 25
x = 25 - 10
x = 15
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a
\(1312:\left(3x-19\right)=32\)
\(3x-19=1312:32\)
\(3x-19=41\)
\(3x=41+19\)
\(3x=60\)
\(x=60:3\)
\(x=20\)
b
\(x+\frac{5}{6}=\frac{11}{2}\)
\(x=\frac{11}{2}-\frac{5}{6}\)
\(x=\frac{14}{3}\)
\(\text{ 32-2.(5+x)=6}\)
\(2.\left(5+x\right)=32-6\)
\(2.\left(5+x\right)=26\)
\(\left(5+x\right)=26:2\)
\(5+x=13\)
\(x=13-5\)
\(\Rightarrow x=5\)
2. (5 + x) = 32 - 6 = 26
5 + x = 26 : 2 = 13
x = 13 - 5 = 8
- ht -