tim x : 1 x 34 +5 x6 + 7 x = 1832
Tim X :
89+x+97=460
410-x+34=80
X x 3+ X x6 +X=700
\(89+x+97=460\)
\(x=460-89-97\)
\(x=274\)
\(410-x+34=80\)
\(410+34-80=x\)
\(x=364\)
410 - x + 34= 80
410 + 34 - 80 = x
x = 364
HOK TỐT
Tim x biet
1/1*3+1/3*5+1/5*7+1/7*9+...+1/x(x+2)=16/34
Tim x biet
1/1*3+1/3*5+1/5*7+1/7*9+...+1/x(x+2)=16/34
Tim x biet.
a/x+5+x-7+x-9=x-5+x-2
b/9(2x-3)+5=4(4-1)-8
c/2=-(×-1)^5+34
d/7=-|x-5|+10
tIM X
6/x=-4/5
`#3107.101107`
`6/x = (-4)/5`
`=> -4x = 6*5`
`=> -4x = 30`
`=> x = 30 \div (-4)`
`=> x = 7,5`
Vậy, `x = 7,5.`
1.a,tim x biet
a,5x+5x+1-50=102
b,10x3x-3x+281
c,tinh a=19x310-311 trên 37x63
Tim x biet (x:2+3)x6+7=25
Tim x
A)x+12/15=7/5
B)x-6/8=3/15
C)x:17/25=15/34
D)1/5×x=9/45
a )
\(x+\frac{12}{15}=\frac{7}{5}\)
\(\Rightarrow x=\frac{7}{5}-\frac{12}{15}\)
\(\Rightarrow x=\frac{7}{5}-\frac{4}{5}\)
\(\Rightarrow x=\frac{3}{5}\)
Vậy \(x=\frac{3}{5}\)
b )
\(x-\frac{6}{8}=\frac{3}{15}\)
\(\Rightarrow x-\frac{3}{4}=\frac{1}{5}\)
\(\Rightarrow x=\frac{1}{5}+\frac{3}{4}\)
\(\Rightarrow x=\frac{4}{20}+\frac{15}{20}\)
\(\Rightarrow x=\frac{19}{20}\)
Vậy \(x=\frac{19}{20}\)
~ Ủng hộ nhé
\(x+\frac{12}{15}=\frac{7}{5}\)
\(\Rightarrow x=\frac{7}{5}-\frac{12}{15}\)
\(\Rightarrow x=\frac{7}{5}-\frac{4}{5}\)
\(\Rightarrow x=\frac{3}{5}\)
c )
\(x:\frac{17}{25}=\frac{15}{34}\)
\(\Rightarrow x=\frac{15}{34}\times\frac{17}{25}\)
\(\Rightarrow x=\frac{3}{10}\)
Vậy \(x=\frac{3}{10}\)
d )
\(\frac{1}{5}\times x=\frac{9}{45}\)
\(\Rightarrow x=\frac{9}{45}:\frac{1}{5}\)
\(\Rightarrow x=\frac{9}{45}\times5\)
\(\Rightarrow x=\frac{9}{5}\)
Vậy \(x=\frac{9}{5}\)
~ Ủng hộ nhé
Tìm các số tự nhiên X biết :
a, ( X-12)x1000=0
b,( 23-X )x34=34
c, ( X-5)x6=24
d,2 X +3=15
e, 6(7X+1)=48
g, ( X -6)(X-34)=0
h, (X-4)(X+2)=0
i, X(X+1)(X+2)=3
\(a,\left(x-12\right)\times1000=0\)
\(x-12=0\)
\(x=0+12\)
\(x=12\)
\(b,\left(23-x\right)\times34=34\)
\(23-x=34:34\)
\(23-x=1\)
\(x=23-1\)
\(x=22\)
\(c,\left(x-5\right)\times6=24\)
\(x-5=24:6\)
\(x-5=4\)
\(x=4+5\)
\(x=9\)
\(d,2x+3=15\)
\(2x=15-3\)
\(2x=12\)
\(x=12:2\)
\(x=6\)
\(e,6\left(7x+1\right)=48\)
\(7x+1=48:6\)
\(7x+1=8\)
\(7x=7\)
\(x=1\)
\(g,\left(x-6\right)\left(x-34\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-6=0\\x-34=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=6\\x=34\end{cases}}\)
\(h,\left(x-4\right)\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-4=0\\x+2=0\end{cases}}\Rightarrow\orbr{\begin{cases}x=4\\x=-2\end{cases}}\)
Bài làm
a) \(\left(x-12\right).1000=0\)
Vì 1000 > 0 \(\Rightarrow x-12=0\Rightarrow x=12\)
b) \(\left(23-x\right).34=34\)
\(\Rightarrow23-x=1\Rightarrow x=22\)
c) \(\left(x-5\right).6=24\Rightarrow x-5=4\Rightarrow x=9\)
d) \(2x+3=15\Rightarrow2x=12\Rightarrow x=6\)
e) \(6\left(7x+1\right)=48\Rightarrow7x+1=8\)
\(\Rightarrow7x=7\Rightarrow x=1\)
g) \(\left(x-6\right).\left(x-34\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-6=0\\x-34=0\end{cases}\Rightarrow\orbr{\begin{cases}x=6\\x=34\end{cases}}}\)
Vậy x= 6 hoặc x= 34
h)\(\left(x-4\right).\left(x+2\right)=0\)
\(\Rightarrow\orbr{\begin{cases}x-4=0\\x+2=0\end{cases}\Rightarrow\orbr{\begin{cases}x=4\\x=-2\end{cases}}}\)
Vậy x=4 hoặc x= -2
i) \(x\left(x+1\right).\left(x+2\right)=3\)
..........
Cậu có thể tam khảo bài làm trên đây ạ, học tốt nha ^^