(x+5)3-1=26
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\(\frac{3}{4}.26\frac{1}{5}.\frac{3}{4}.44\frac{1}{5}=\frac{3}{4}.\frac{131}{5}.\frac{3}{4}.\frac{221}{5}=651,3975\)
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3 210.
321 x 3 + 321 x 5 + 321 x 2
= 321 x (3 + 5 + 2)
= 321 x 10
= 3210
174 x 36 - 174 x 26
= 174 x ( 36 - 26 )
= 174 x 10
= 1740
2/3 x 4/5 + 1/8 x 2/3
= 2/3 x ( 4/5 + 1/8 )
= 2/3 x 37/40
= 37/60
`=174xx(36-26)`
`=174xx10=1740`
`=2/3xx(4/5+1/8)`
`=2/3xx37/40=37/60`
\(x.\frac{2}{3}+x.\frac{1}{5}=\frac{26}{15}\)
\(x.\left(\frac{2}{3}+\frac{1}{5}\right)=\frac{26}{15}\)
\(x.\frac{13}{15}=\frac{26}{15}\)
\(x=\frac{26}{15}:\frac{13}{15}\)
vậy x=2
hok tốt nha!
v
\(x.\frac{2}{3}+x.\frac{1}{5}=\frac{26}{15}\)
\(x.\left(\frac{2}{3}+\frac{1}{5}\right)=\frac{26}{15}\)
\(x.\frac{13}{15}=\frac{26}{15}\)
\(x=\frac{26}{15}:\frac{13}{15}\)
\(x=2\)
1) 2⁴.x - 3.5x = 5² - 2⁴
16x - 15x = 25 - 16
x = 9
2) 3².x + 2²x = 26.2² - 13
9x + 4x = 26.4 - 13
13x = 104 - 13
13x = 91
x = 91 : 13
x = 7
5) 6²x - 5²x = 11.2 - 11
36x - 25x = 22 - 11
11x = 11
x = 11 : 11
x = 1
3) 5²x - 2⁴x = 3⁴ - 16.3²
25x - 16x = 81 - 16.9
9x = -63
x = -63 : 9
x = -7
6) 7²x - 6²x = 13.2³ - 26
49x - 36x = 13.8 - 26
13x = 104 - 26
13x = 78
x = 78 : 13
x = 6
4) 7²x - 14x = 7².10 - 70
49x - 14x = 49.10 - 70
35x = 490 - 70
35x = 420
x = 420 : 35
x = 12
2: =>(3x-7)^2=25/144=(5/12)^2
=>3x-7=5/12 hoặc 3x-7=-5/12
=>3x=5/12+7=89/12 hoặc 3x=7-5/12=79/12
=>x=89/36 hoặc x=79/36
3:Sửa đề: |2x-3|=|x+1|
=>2x-3=x+1 hoặc 2x-3=-x-1
=>x=4 hoặc 3x=2
=>x=2/3 hoặc x=4
4: =>3x+1=5 hoặc 3x+1=-5
=>3x=4 hoặc 3x=-6
=>x=-2 hoặc x=4/3
1: =>\(2x-7=\sqrt[3]{\dfrac{26}{63}}\)
=>\(2x=\sqrt[3]{\dfrac{26}{63}}+7\)
=>\(x=\dfrac{1}{2}\cdot\left(\sqrt[3]{\dfrac{26}{63}}+7\right)\)
(x+5)3-1=26
(x+5)3=26+1
(x+5)3=27
(x+5)3=33
x+5=3
x=3-5
x=-2
(x+5)^3 = 27
(x+5)^3 = 3^3
x+5 = 3
x=-2