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\(3,25.\left(-\frac{4}{3}\right)^2-1\frac{1}{3}.2005^0.\left|-2+\frac{2}{3}\right|\)
\(=\frac{13}{4}.\frac{16}{9}-\frac{4}{3}.1.\left|-\frac{4}{3}\right|\)
\(=\frac{13}{4}.\frac{16}{9}-\frac{4}{3}.1.\frac{4}{3}\)
\(=\frac{52}{9}-\frac{4}{3}.\frac{4}{3}\)
\(=\frac{52}{9}-\frac{16}{9}\)
\(=\frac{52-16}{9}\)
\(=\frac{36}{9}\)
\(=4.\)
(-5/4x+3,25)[3/5-(-5/2x)]=0
=>-5/4x+3,25 = 0 hoặc 3/5-(-5/2x)=0
=>+)-5/4x+3,25 = 0
=>-5/4x =-3,25
=>x= -2,6
+)3/5-(-5/2x)=0
=>3/5+5/2x=0
5/2x = -3/5
=> x= -0,24.
\(37-2x\left[y-3,25\right]=7.06 \)
\(2x\left[y-3.25\right]=37-7,06\)
\(2x\left[y-3.25\right]=29.94\)
\(y-3,25=29,94:2\)
\(y-3,25=14,97\)
\(y=14,97+3,25\)
\(y=18,22\)
37 - 2 x [ y - 3,25 ] = 7,06
=> 2 x [ y - 3,25 ] = 29,94
=> [ y - 3,25 ] = 14,97
=> y = 18,82
\(\frac{1}{4}+\frac{3}{4}:\left(\frac{1}{5}+x\right)=3,25\)
\(\frac{3}{4}:\left(\frac{1}{5}+x\right)=3,25-\frac{1}{4}=3\)
\(\frac{1}{5}+x=\frac{3}{4}:3=\frac{1}{4}\)
\(x=\frac{1}{4}-\frac{1}{5}=\frac{1}{20}\)
3/4:(1/5+x)=1/4-3,25
3/4:(1/5+x)=(-3)
1/5+x=3/4:(-3)
1/5+x=(-1/4)
x=(-1/4)-1/5
x=(-9/20)
\(x+\left(2+\frac{1}{3}\right).x-3,25.x=62,5\%\)
\(x.\left(1+2+\frac{1}{3}-3,25\right)=\frac{5}{8}\)
\(x.\frac{1}{12}=\frac{5}{8}\)
\(x=\frac{5}{8}:\frac{1}{12}\)
\(x=\frac{15}{2}\)
Chúc bn học tốt !!!!