a) (2x-7) -(x+135)=0
a) ( 2x + 7 ) + 135 = 0
b) 1/2x + 150%x = 2014
2x + 7=0-135
2x + 7=-135
2x=-135-7
2x=-142
x=-142:2
x=-71
1/2x + 3/2x=2014
x(1/2+3/2)=2014
2x=2014
x=2014:2
x=1007
a) ( 2x + 7) + 135 = 0
2x + 7 = -135
2x = -142
x = -71
b) \(\frac{1}{2}x+\frac{150}{100}x=2014\)
\(\frac{1}{2}x+\frac{3}{2}x=2014\)
\(\left(\frac{1}{2}+\frac{3}{2}\right)x=2014\)
\(2x=2014\)
\(x=1007\)
k nhé bn
tìm x:
a,x+(x+1)+(x+3)=153
b,(2x-7)-(x+135)=0
a, \(x\) + (\(x\) + 1) + (\(x\) + 3) = 153
\(x\) + \(x\) + 1 + \(x\) + 3 = 153
3\(x\) + 4 = 153
3\(x\) = 153 - 4
3\(x\) = 149
\(x\) = 149 : 3
\(x\) = \(\dfrac{149}{3}\)
b, (\(2x-7\)) - (\(x\) + 135) =0
2\(x\) - 7 - \(x\) - 135 = 0
\(x\) - 142 = 0
\(x\) = 142
(2x-7)-(x+135)=0
( 2x - 7) - (x + 135)=0
=> 2x -7 -x +135 =0
=>x +128 =0
=>x = - 128
Ta có : ( 2x - 7 ) - ( x + 135 ) = 0
suy ra: 2x - 7 - x - 135 = 0
suy ra: 2x - 7 - x = 135
suy ra: x(2 - 1 ) - 7 = 135
suy ra: x(2-1)= 135 + 7 = 142
suy ra:x . 1 = 142
suy ra : x = 142 : 1 = 142
Vậy ...................................
Tìm số tự nhiên x,biết:
a) (2x-7) -135=0
b) 122+(37-3x)=0
(2x-7)-135=0
2x-7=0+135
2x-7=135
2x=135+7
2x=142
x=142:2
x=71
vậy x=71
b)122+(37-3x)=0
37-3x=0-122
37-3x=-122
3x=37-(-122)
3x=159
x=159:3
x=53
vậy x=53
nhớ **** cho mình nha
1 Tìm số nguyên x, biết :
a) (2x+7)+135=0 ; b) (162+3x)+(x-2)=0
a) \(\left(2x+7\right)+135=0\)
\(2x+7=0-135\)
\(2x+7=-135\)
\(2x=-135-7\)
\(2x=-142\)
\(x=-142:2\)
\(x=-71\left(tm\right)\)
Vậy \(x=-71\)
a) (2x+7) + 135 = 0
2x+7= -135
2x= -135-7
2x=-142
x= -142 : 2=-71
b) (162 +3x) +(x-2)=0
162+ 3x + x-2=0
162+ x(3+1)-2=0
x.4= 0-162 +2
x.4= -160
x= -160: 4= -40
Chúc bạn học tốt
a) (2x-7)-(x+135)=0
b) (x+3)×(x-5) x thuoc N
Tìm x , biết :
(2x-7)-(x+135)=0
tìm x biết
a) (2x-7)-(x+135)=0
b) 12-(39-3x)=0
c) (14-3x)+(6+x)=0
a) ta có : \(\left(2x-7\right)-\left(x+135\right)=0\Leftrightarrow2x-7-x-135=0\)
\(\Leftrightarrow x-142=0\Leftrightarrow x=142\) vậy \(x=142\)
b) ta có : \(12-\left(39-3x\right)=0\Leftrightarrow12-39+3x=0\Leftrightarrow3x-27=0\)
\(\Leftrightarrow3x=27\Leftrightarrow x=\dfrac{27}{3}=9\) vậy \(x=9\)
c) ta có : \(\left(14-3x\right)+\left(6+x\right)=0\Leftrightarrow14-3x+6+x=0\)
\(\Leftrightarrow20-2x=0\Leftrightarrow2x=20\Leftrightarrow x=\dfrac{20}{2}=10\) vậy \(x=10\)
( 2x - 7 ) - ( x + 135 ) = 0
( 2x - 7 ) - ( x + 135 ) = 0
<=> 2x-7 = 0+x+135
<=> 2x-7=x+135
<=> 2x-x = 7+135
<=> x = 142
Vậy x =2
(Do cậu không ghi rõ đề bài là gì , nên mk nghĩ đề là tìm x )
Học tốt
2x-7-x-135=0
2x-x-7-135=0
x-(-128)=0
x+128=0
x=0-128=-128
Ta có: ( 2x - 7 ) - ( x + 135 ) = 0
=> 2x - 7 - x - 135 = 0
=> 2x -x - ( 7 + 135 ) = 0
=> x - 142 = 0
=> x = 142
Vậy: x = 142