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\(\left(0,4x-2\right)-\left(1,5x+1\right)-\left(-4x-0,8\right)=3,6\)
\(0,4x-2-1,5x-1+4x+0,8=3,6\)
\(2,9x-2,2=3,6\)
\(2,9x=5,8\)
\(x=2\)
0,25x -0,4x = 1
x(0,25 - 0,4) = 1
-0,15x =1
x = 1 : (-0,15)
x = - 20/3
\(125+\left\{7,5-\left[8,5:2,5+0,8\right].0,6\right\}-3.6:\left(4-1,5\right)\)
\(=125+\left\{7,5-\left[3,4+0,8\right].0,6\right\}-3,6:2,5\)
\(=125+\left\{7,5-\left[4,2\right].0,6\right\}-1,44\)
\(=125+\left\{3,3.0,6\right\}-1,44\)
\(=125+1,98-1,44\)
\(=126,98-1,44\)
\(=125,54\)
\(x:60\%+0,4x=2\)
\(\Rightarrow\dfrac{5}{3}x+0,4x=2\)
\(\Rightarrow\left(\dfrac{5}{3}+0,4\right)x=2\)
\(\Rightarrow\dfrac{31}{15}x=2\)
\(\Rightarrow x=2:\dfrac{31}{15}\)
\(\Rightarrow x=\dfrac{30}{31}\)
#DarkPegasus
60% + 0,4x=2
0,4x=2-60%
0,4x=2-0,6
0,4x=1,4
x=1,4:0,4
x=3,5
Vậy:...
nhớ ticks nhe
\(60\%.x-0,4.x+x:3=2\)
\(\dfrac{3}{5}.x-\dfrac{2}{5}.x+\dfrac{1}{3}.x=2\)
\(x\left(\dfrac{3}{5}-\dfrac{2}{5}+\dfrac{1}{3}\right)=2\)
\(x.\dfrac{8}{15}=2\)
\(x=2:\dfrac{8}{15}\)
\(x=\dfrac{15}{4}\)
\(0,4.x-\frac{1}{5}.x=\frac{3}{4}\)
<=> \(x.\left(0,4-\frac{1}{5}\right)=\frac{3}{4}\)
<=> \(x.\frac{1}{5}=\frac{3}{4}\)
<=> \(x=\frac{3}{4}:\frac{1}{5}\)
<=> \(x=\frac{15}{4}\)
kết luận : \(x=\frac{15}{4}\)