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\(\frac{x}{2}\cdot3+4x=23,1\)
\(\Leftrightarrow x\cdot\frac{3}{2}+4\cdot x=23,1\)
\(\Leftrightarrow x\left(\frac{3}{2}+4\right)=23,1\)
\(\Leftrightarrow x\cdot\frac{11}{2}=23,1\)
\(\Leftrightarrow x=4,2\)
2 * x + 14 * (34-9) = 900
2 * x + 14 * 25 = 900
2 * x + 350 = 900
2 * x = 550
x = 550 : 2
x = 275
97 - x =486 : 27
97 - x = 18
x= 97 - 18
x = 79
9 * x - 4 * x = 24 * 5
9 * x - 4 * x = 120
( 9 - 4 ) * x = 120
5 * x =120
x= 120 :5
x =24
dài v ~
4/3 * (7/2 - 5/4 ) - 3/4 * x =2
4/3 * 9/4 - 3/4 * x = 2
3 - 3/4 * x = 2
9/4 * x =2
x = 2 : 9/4
x = 8/9
~~~~~~~~~~
5/3 * x - 3/4 * x + 4/3 = 11/6
( 5/3- 3/4 ) * x + 4/3 =11/6
11/12 * x + 4/3 = 11/6
11/12 * x = 11/6 - 4/3
11/12 * x = 1/2
x= 1/2 : 11/12
x=6/11
dài quá mức bấm mãi ~
Tìm x:
a)
2 * x + 14* ( 34 - 9 ) = 900
2* x + 14 * 25 = 900
2*x + 350 = 900
2*x = 900 - 350
2*x = 550
x = 550 : 2
x = 275
b)
97 - x = 486: 27
97 - x = 18
x = 97 - 18
x = 79
c) 9 * x - 4 * x = 24 * 5
x - ( 9* 4 ) = 120
x - 36 = 120
x = 120 + 36
x = 156
Ủng hộ nha! ^.^
\(x+x\times\frac{1}{3}:\frac{2}{9}+x:\frac{2}{7}=252\)
\(x+x\times\frac{3}{2}+x\times\frac{7}{2}=252\)
\(x\times\left(1+\frac{3}{2}+\frac{7}{2}\right)=252\)
\(x\times6=252\)
\(x=252:6\)
\(x=42\)
X + X x \(\frac{1}{3}\)x\(\frac{9}{2}\)+ X x\(\frac{7}{2}\)= 252
X + X x \(\frac{3}{2}\)+ X x \(\frac{7}{2}\)= 252
X x (\(\frac{3}{2}\)+ \(\frac{7}{2}\)+1) = 252
X x (\(\frac{3}{2}\)+ \(\frac{7}{2}\)+ \(\frac{2}{2}\)) = 252
X x 6 = 252
X = 252 : 6
X= 42
Chúc bạn học tốt! ^^
\(\frac{2,4\times1994\times2+1,6\times3996\times3+1,2\times4010\times4}{3+7+11+...+95+99-275}\)
\(=\frac{0,2\times6\times2\times2\times997\times2+0,2\times8\times6\times666\times3+0,2\times6\times2\times2005\times4}{\left(99+3\right)\times49:2-275}\)
\(=\frac{0,2\times6\times8\times997+0,2\times8\times6\times666\times3+0,2\times6\times8\times2005}{2499-275}\)
\(=\frac{0,2\times6\times8\times\left(997+666\times3+2005\right)}{2224}\)
\(=\frac{0,2\times2\times3\times8\times\left(997+1998+2005\right)}{8\times2\times0,2\times695}\)
\(=\frac{3\times\left(2995+2005\right)}{695}\)
\(=\frac{3\times5000}{695}=\frac{3\times1000\times5}{5\times139}\)
\(=\frac{3\times1000}{139}=\frac{3000}{139}\)
a)x-3=9/4-1/2
x-3=9/4-2/4
x-3=7/4
x=7/4+3
x=7/4+12/4
x=19/4
b)x:17,6=100-63,2
x:17,6=36,8
x=36,8x17,6
x=647,68
\(\left(1-\frac{1}{2}\right)x\left(1-\frac{1}{3}\right)x\left(1-\frac{1}{4}\right)x\left(1-\frac{1}{5}\right)x\left(1-\frac{1}{6}\right)\)
\(=\frac{1}{2}.\frac{2}{3}.\frac{3}{4}.\frac{4}{5}.\frac{5}{6}\)
\(=\frac{1.2.3.4.5}{2.3.4.5.6}=\frac{1}{6}\)
\(\frac{x}{2}\cdot3+x\cdot4=23,1\)
\(\frac{x\cdot3}{2}+x\cdot4=23,1\)
\(x\cdot\left(\frac{3}{2}+4\right)=23,1\)
\(x\cdot\frac{11}{2}=23,1\)
\(x=23,1:\frac{11}{2}=4,2\)
sai rồi nhé