(x + 2) + ( x + 4) + ( x + 6) + ( x + 8 ) + ( x + 10 ) + (X+ 12) = 192
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VT
5 tháng 8 2016
a) x=-213:(1+2+3+4+...+100)<=>x=-213/100
b) x-x=-1/3-2/4 <=> 0= -5/6 (vô lý )
c) x=-0,8119408369
d) x= 0.0258907758
NX
16 tháng 8 2023
a) \(\dfrac{13}{20}+\dfrac{3}{5}+x=\dfrac{5}{6}\)
\(\Rightarrow\dfrac{5}{4}+x=\dfrac{5}{6}\)
\(\Rightarrow x=\dfrac{5}{6}-\dfrac{5}{4}\)
\(\Rightarrow x=\dfrac{-5}{12}\)
b) \(x+\dfrac{1}{3}=\dfrac{2}{5}-\dfrac{-1}{3}\)
\(\Rightarrow x+\dfrac{1}{3}=\dfrac{11}{15}\)
\(\Rightarrow x=\dfrac{11}{15}-\dfrac{1}{3}\)
\(\Rightarrow x=\dfrac{2}{5}\)
c)\(\dfrac{-5}{8}-x=\dfrac{-3}{20}-\dfrac{-1}{6}\)
\(\dfrac{-5}{8}-x=\dfrac{1}{60}\)
\(\Rightarrow x=\dfrac{-5}{8}-\dfrac{1}{60}\)
\(\Rightarrow x=\dfrac{-77}{120}\)
d) \(\dfrac{3}{5}-x=\dfrac{1}{4}+\dfrac{7}{10}\)
\(\Rightarrow\dfrac{3}{5}-x=\dfrac{19}{20}\)
\(\Rightarrow x=\dfrac{3}{5}-\dfrac{19}{20}\)
\(\Rightarrow x=\dfrac{-7}{20}\)
e) \(\dfrac{-3}{7}-x=\dfrac{4}{5}+\dfrac{-2}{3}\)
\(\Rightarrow\dfrac{-3}{7}-x=\dfrac{2}{15}\)
\(\Rightarrow x=\dfrac{-3}{7}-\dfrac{2}{15}\)
\(\Rightarrow x=\dfrac{-59}{105}\)
NX
16 tháng 8 2023
g) \(\dfrac{-5}{6}-x=\dfrac{7}{12}+\dfrac{-1}{3}\)
\(\Rightarrow\dfrac{-5}{6}-x=\dfrac{1}{4}\)
\(\Rightarrow x=\dfrac{-5}{6}-\dfrac{1}{4}\)
\(\Rightarrow x=\dfrac{-13}{12}\)
LM
Lê Minh Vũ
VIP
25 tháng 9 2021
\(a)\)\(\left[\left(8.x-12\right)\div4\right].3^3=3^6\)
\(\left[\left(8.x-12\right)\div4\right]=3^6\div3^3\)
\(\left[\left(8.x-12\right)\div4\right]=3^3\)
\(\left(8.x-12\right)\div4=27\)
\(\left(8.x-12\right)=27.4\)
\(8.x-12=108\)
\(8.x=108+12\)
\(8.x=120\)
\(x=120\div8\)
\(x=15\)
LM
Lê Minh Vũ
VIP
25 tháng 9 2021
\(b)\)\(3^{2.x-4}-x^0=8\)
\(3^{2.x-4}-1=8\)
\(3^{2.x-4}=8+1\)
\(3^{2.x-4}=9\)
\(3^{2.x-4}=3^2\)
\(2.x-4=2\)
\(2.x=2+4\)
\(2.x=6\)
\(x=3\)
TT
4
NH
3 tháng 5 2023
`7xx8xx12/6xx21xx16`
`=7xx8xx2xxx21xx16`
`=56xx2xx21xx16`
`=112xx21xx16`
`=2352xx16`
`=37632`
DT
0
x+ 2 + x+ 4 + x +6 + x + 8 + x + 10 + x + 12 = 192
6x + 2+ 4 + 6 + 8 + 10 + 12 = 192
6x+ 42 = 192
6x= 192 - 42
6x= 150
x = 150 : 6
x= 25
x+2+x+4+x+6+x+8+x+10+x+12= 192
<=> 6x + 42 = 192
<=> 6x = 150
<=> x = 25