Tìm x biết 96-(3,75÷x)=94,5
96 : ( 3,75 : x ) = 94,5
1/2 + 1/14 + 1/35 + 1/x * ( 3 + x ) = 6/13
96 : ( 3,75 : x ) = 94,5
3,75 : x = 96 : 94,5
3,75 : x = \(\frac{96}{94,5}\)
x = 3,75 : \(\frac{96}{94,5}\)
x = \(\frac{354,375}{96}\)
\(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{x}\left(3+x\right)=\frac{6}{13}\)
\(\Rightarrow\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{3+x}{x}=\frac{6}{13}\)
\(\Rightarrow\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+1+\frac{3}{x}=\frac{6}{13}\)
\(\Rightarrow\frac{3}{x}+\frac{8}{5}=\frac{6}{13}\)
\(\Rightarrow\frac{3}{x}=-\frac{74}{65}\)
\(\Rightarrow-74x=195\)
\(\Rightarrow x=\frac{-195}{74}\)
\(\frac{1}{2}+\frac{1}{14}+\frac{1}{35}+\frac{1}{x\left(3+x\right)}=\frac{6}{13}\)
\(\frac{3}{5}+\frac{1}{x\left(3+x\right)}=\frac{6}{13}\)
\(\frac{1}{x\left(3+x\right)}=-\frac{9}{65}\)
\(\Rightarrow-9x\left(3+x\right)=65\)
\(\Rightarrow-9x^2-27x-65=0\)
\(\Rightarrow9x^2-27x+65=0\)
Đề sai
2. tìm số tự nhiên x , biết x * ba x phần 1000 = 3,005
* 50,05 <x+x+x+x+x+x+x+x+x+x< 60,02
3 . tìm y
96 - ( 3,75 : y ) = 94,5
6/13 : (1/2 +y ) = 15/39
3,16 : (y*0,4) = 7,9
GIÚP TỚ VỚIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
\(96-\left(3,75:y\right)=94,5\) \(ĐKXĐ:y\ne0\)
\(3,75:y=96-94,5\)
\(3,75:y=1,5\)
\(y=\frac{3,75}{1,5}\)
\(y=2,5\) ( TM ĐKXĐ: \(x\ne0\))
vậy \(y=2,5\)
Những câu khác làm tương tự
a) (y - 21 x 13) : 11 = 30 b) (627 - 138) : (y : 2 ) = 163
c) 96 - (3,75 : y ) = 94,5 d)3,16 : ( y x 0,4) = 7,9
a, ( y - 21 x 13 ) : 11 = 30
y - 273 = 30 x 11
y - 273 = 330
y = 330 + 273
y = 603
b, ( 627 - 138 ) : ( y : 2 ) = 163
489 : ( y : 2 ) = 163
y : 2 = 489 : 163
y : 2 = 3
y = 3 x 2 =6
c. 96 - ( 3,75 : y ) = 94,5
3,75 : y = 96 - 94,5
3,75 : y = 1,5
y = 3,75 : 1,5 = 2,5
d, 3,16 : ( y x 0,4 ) = 7,9
y x 0,4 = 3,16 : 7,9 = 0,4
y = 0,4 : 0,4 = 1
a) 96- (y : 3,75) = 94,5
a) 96- (y : 3,75) = 94,5
y:3,75 = 96 - 94,5
y: 3,75 = 1,5
y = 1,5 x 3,75
y = 5,625
a) 96- (y : 3,75) = 94,5
y:3,75=96-94,5
y:3,75=1,5
y=1,5 . 3,75
y=5,625=45/8
96-( y : 3,75 ) = 94,5
y : 3,75 = 96-94,5
y : 3,75 = 1,5
y = 1,5 x 3,75
y = 5,25
3/4:x/6=75%
(1/4*x-1/8).3/4-1/4
71+65*4=x+140/x+260
7878:(12*x-91)=78
2/7+3/7<x<14/5+7/5
(x+1)+(x+4)+(x+7)+(x+10)+.....+(x+34)=330
96-3,75:x=94,5
(7*13+8*13):(29/3-x)=39
96-3.75 :x =94,5
Giair chi tiết giúp mk nhé bạn iu !!!!!!!!!
96 - 3. 75: x= 94,5
96 - 225: x= 945\10
96- 225: x= 189\2
225: x= 96- 189\2
225:x=192\2-189\2
225:x=3\2
x=225:3\2
X=225.2\3
x=150
96 - 3. 75: x= 94,5
96 - 225: x= 945\10
96- 225: x= 189\2
225: x= 96- 189\2
225:x=192\2-189\2
225:x=3\2
x=225:3\2
X=225.2\3
x=150
96 - 3. 75: x= 94,5
96 - 225: x= 945\10
96- 225: x= 189\2
225: x= 96- 189\2
225:x=192\2-189\2
225:x=3\2
x=225:3\2
X=225.2\3
x=150
\(\dfrac{\left(94,5\right)^{^2}.\left(-2,5\right)^6}{\left(-3,75\right)^5}\)
\(=\dfrac{\left(\dfrac{35721}{4}\right)\cdot2.5^6}{\left(-\dfrac{15}{4}\right)^5}=\dfrac{3^6\cdot7^2}{4}\cdot\dfrac{5^6}{2^6}:\dfrac{-3^5\cdot5^5}{2^{10}}\)
\(=\dfrac{3^6\cdot7^2\cdot5^6}{2^8}\cdot\dfrac{2^{10}}{-3^5\cdot5^5}=-2^2\cdot3\cdot5\cdot7^2=-2940\)
giai giup mik nha:
Bài 1 Tìm x
1.3/4:x/6=75/100
2.(1/4*x-1/8)*3/4-1/4
3.71+65*4=x+140/x +260
4.7878:(12*x-91)=78
5.2/7+3/7<x<14/5+7/5
6.(x+1)+(x+4)+(x+7)+(x+10)+....+(x+34)=330
7.96-3,75:x=94,5
8.(7*13+8*13):(29/3-x)=39
Lưu ý:câu3 có nghĩa là x+140 trên x rồi +260
1) 3/4 : x/6 = 75/100
x/6 = 3/4 : 75/100
x/6 = 1
x = 1*6
x = 6
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giai giup mik nha:
Bài 1 Tìm x
1.3/4:x/6=75/100
2.(1/4*x-1/8)*3/4-1/4
3.71+65*4=x+140/x +260
4.7878:(12*x-91)=78
5.2/7+3/7<x<14/5+7/5
6.(x+1)+(x+4)+(x+7)+(x+10)+....+(x+34)=330
7.96-3,75:x=94,5
8.(7*13+8*13):(29/3-x)=39
Lưu ý:câu3 có nghĩa là x+140 trên x rồi +260
1.\(\frac{3}{4}:\frac{x}{6}=\frac{75}{100}\) \(\Leftrightarrow\frac{3}{4}.6.\frac{1}{x}=\frac{3}{4}\)
\(\Leftrightarrow\frac{6}{x}=1\)
\(\Leftrightarrow x=\frac{1}{6}\)