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12(x - 6) = 4x + 12
12x - 72 = 4x + 12
12x - 4x = 12 + 72
8x = 84
x = 84 : 8
x = 21/2
\(1-x=\frac{29}{12}+\frac{32}{8}\)
\(\Rightarrow1-x=\frac{77}{12}\)
\(\Rightarrow x=1-\frac{77}{12}=\frac{-65}{12}\)
\(\frac{31}{8}.x-\frac{11}{4}=\frac{42}{12}.\frac{10}{8}-\frac{1}{3}\)
\(\Rightarrow\frac{31}{8}.x-\frac{11}{4}=\frac{35}{8}-\frac{1}{3}\)
\(\Rightarrow\frac{31}{8}.x-\frac{11}{4}=\frac{97}{24}\)
\(\Rightarrow\frac{31}{8}.x=\frac{97}{24}+\frac{11}{4}=\frac{163}{24}\)
\(\Rightarrow x=\frac{163}{24}:\frac{31}{8}=\frac{163}{93}\)
3(x+2)=12(6-x)+1
=> 3x +6 = 72 -12x +1
=> 3x + 6 -72 +12x -1 =0
=> 15x -67 =0
=> 15x = 67
=> x = 67/15
a) \(x:3\frac{5}{6}=2\frac{8}{15}\) b) \(\frac{12}{5}:x+\frac{4}{3}=3\frac{2}{3}\)
\(x:\frac{23}{6}=\frac{38}{15}\) \(\frac{12}{5}:x+\frac{4}{3}=\frac{11}{3}\)
\(x=\frac{38}{15}\times\frac{23}{6}\) \(\frac{12}{5}:x=\frac{11}{3}-\frac{4}{3}\)
\(x=\frac{437}{45}\) \(\frac{12}{5}:x=\frac{7}{3}\)
\(x=\frac{12}{5}:\frac{7}{3}\)
\(x=\frac{36}{35}\)
b: Ta có: 125:x+43=3+23125:x+43=3+23
⇔125:x=3−23=73⇔125:x=3−23=73
hay x=125:73=3635
a, \(x:3\dfrac{5}{6}=2\dfrac{8}{15}\)
\(x:\dfrac{23}{6}\) = \(\dfrac{38}{15}\)
\(x=\dfrac{38}{15}\times\dfrac{23}{6}\)
\(x=\dfrac{437}{45}\)
b, \(\dfrac{12}{15}:x+\dfrac{4}{3}=3\dfrac{2}{3}\)
\(\dfrac{12}{15}:x+\dfrac{4}{3}=\dfrac{11}{3}\)
\(\dfrac{12}{15}:x=\dfrac{11}{3}-\dfrac{4}{3}\)
\(\dfrac{12}{15}:x=\dfrac{7}{3}\)
x= \(\dfrac{12}{15}:\dfrac{7}{3}=\dfrac{12}{35}\)
\(c)x:\dfrac{5}{4}=\dfrac{9}{5}+\dfrac{1}{2}\)
\(x:\dfrac{5}{4}=\dfrac{23}{10}\)
\(x=\dfrac{23}{10}\times\dfrac{5}{4}\)
\(x=\dfrac{23}{8}\)
a,x/12-1/3=3/4
x/12 =3/4+1/3
x/12 =13/12
vậy x =13
b,3/4-x=5/12
x=3/4-5/12
x=4/12=1/3
c,x nhân 2/3-1/3=1/4
x nhân 2/3 =1/4+1/3
x nhân 2/3 =7/12
x =7/12 : 2/3
x =21/24=7/8
d,5/7-(x-1/2)=1/7
x-1/2 =5/7-1/7
x -1/2 =4/7
x =4/7+1/2
x =15/14
bạn nhớ k cho mình nhé!
\(1-2-3+4+5-6-7+8+...+97-98-99+100+101\)
\(=\left(1-2-3+4\right)+\left(5-6-7+8\right)+...+\left(97-98-99+100\right)+101\)
\(=0+0+...+0+101\)
\(=101\)
=(5,44x6-2x2,72x6)x(5,44x6-2,72)
=[5,44x(6-6)]x(5,44x6-2,72)
=0x(5,44x6-2,72)
=0
Ngoặc sau em ghi không rõ nhưng không quan trọng vì ngoặc trước có kết quả = 0
Đề: Tìm x
\(12\times\left(x-6\right)=4\times x+12\)
\(12\times x-12\times6=4\times x+12\)
\(12\times x-72=4\times x+12\)
\(12\times x-4\times x=72+12\)
\(8\times x=84\)
\(x=84:8\)
\(x=10,5\)
\(12\times\left(x-6\right)=4\times x+12\)
\(12\times x-72=4\times x+12\)
\(12\times x-4\times x=12+72\)
\(8\times x=84\)
\(x=10,5\)