TÌM SỐ NGUYÊN X:
(x+5)+9-x=x+2
x+5+9-x=x+2
x+5+x-9=x+2
trả lời gấp cho mik nha.Thanks
love y....
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1.
7/15:(1/2-9/10xX)-1/6=13/6
=>7/15:(1/2-9/10xX)=13/6+1/6
=>7/16:(1/2-9/10xX)=7/3
=>1/2-9/10xX=7/16:7/3
=>1/2-9/10xX=3/16
=>9/10xX=1/2-3/16
=>9/10xX=5/16
=>X=5/16:9/10
=>X=25/72
a) \(-\left(x+2\right)-\left(x+3\right)=x\)
\(\Leftrightarrow-\left(x+2\right)-\left(x+3\right)-x=0\)
\(\Leftrightarrow-x-2-x-3-x=0\)
\(\Leftrightarrow-3x-5=0\)
\(\Leftrightarrow-3x=5\)
\(\Leftrightarrow x=\dfrac{-5}{3}\)
Vậy \(x=\dfrac{-5}{3}\)
b) \(-\left(x+2\right)+x+3=x\)
\(\Leftrightarrow-\left(x+2\right)+x+3-x=0\)
\(\Leftrightarrow-x-2+x+3-x=0\)
\(\Leftrightarrow-x+1=0\)
\(\Leftrightarrow-x=-1\)
\(\Leftrightarrow x=1\)
Vậy \(x=1\)
c) \(x+2+x+3=x\)
\(\Leftrightarrow x+2+x+3-x=0\)
\(\Leftrightarrow x+5=0\)
\(\Leftrightarrow x=-5\)
Vậy \(x=-5\)
x^2 - 4x + 4 = 5 ( x - 2 )
x^2 - 4x + 4 - 5 ( x - 2 ) = 0
( x - 2 ) ^2 - 5 ( x - 2 ) = 0
( x - 2 ) ( x - 2 - 5 ) = 0
( x - 2 ) ( x - 7 ) = 0
x - 2 = 0 hoặc x - 7 = 0
x = 2 hoặc x = 7
c) (x-2)^2=5(x-2)
=> x-2=5 hoặc x-2 =0
=> x=7 hoặc x=2
d) (2x-3)^2=(5-x)^2
=> 2x-3=5-x
=> x=8/3
a)-6x=6
x=-1
b)8x=35->x=35/8
c)8|x|=35->|x|=35/2->x=35/2;x=-35/2
mấy ý kia tương tự bạn ạ!
13/15-(y.4/15-2/9).3/5=1/5
(y.4/15-2/9).3/5=13/15-1/5
(y.4/15-2/9).3/5=2/3
y.4/15-2/9=2/3:3/5
y.4/15-2/9=10/9
y.4/15=10/9+2/9
y.4/15=4/3
y=4/3:4/15
y=5
Những chỗ có dấu "." thì thay bằng dấu nhân
a) \(\left(x+5\right)+9-x=x+2\)
\(\Leftrightarrow\left(x+5\right)+9-x-\left(x+2\right)=0\)
\(\Leftrightarrow x+5+9-x-x-2=0\)
\(\Leftrightarrow12-x=0\)
\(\Leftrightarrow x=12-0\)
\(\Leftrightarrow x=12\)
Vậy x=12
b) \(x+5+9-x=x+2\)
\(\Leftrightarrow x+5+9-x-\left(x+2\right)=0\)
\(\Leftrightarrow x+5+9-x-x-2=0\)
\(\Leftrightarrow12-x=0\)
\(\Leftrightarrow x=12-0\)
\(\Leftrightarrow x=12\)
Vậy x=12
c) \(x+5+x-9=x+2\)
\(\Leftrightarrow x+5+x-9-\left(x+2\right)=0\)
\(\Leftrightarrow x+5+x-9-x-2=0\)
\(\Leftrightarrow x-6=0\)
\(\Leftrightarrow x=6+0\)
\(\Leftrightarrow x=6\)
Vậy x=6