2x-7=11
\(\Rightarrow\)2x=11+7
\(\Rightarrow\)2x=18
\(\Rightarrow\)x=18:2
\(\Rightarrow\)x=9
2x - 7 =11
2x = 11 + 7
2x = 18
x = 18 : 2
x = 9
(4,5-2x).11/7=11/4
( 9/2 - 2x )× 11/7 = 11/14
-17.(-3)-(x+29)=-11-3x
15-2x=-11-3x
-17-4x=-19.3-2x
46-(52-x)=12.(-7)+2x
22/25 x 5/11 - 33/25 : 11/5 + 58/11
8 3/11 - (3 5/7 - 7 8/11 )
1/5 + 7/5 : x = -3/20
5/6x + 325% = 3/2x -30,75
(4,5-2x).11/7=11/4
a, \(\dfrac{1}{3}+\dfrac{2}{3}:x=-7\) b, \(\left(\dfrac{9}{2}-2x\right).\dfrac{11}{7}=\dfrac{11}{14}\)
Bài 1:
a)-2x-3.( x-17 )= 34-2.( -x+25 )
b)17x+3.( -16x-37 )= 2x+43-4x
c){-3x+2. [ 45-x-3 ( 3x+7 ) -2x]+4x} = 55
g)-103-57: [ 5.( 2x-1 )2-( -9 )0 ]
Bài 2:
a)-5.( -x+7 )-3.( -x-5 )=-4.( 12-x )+48
b)7.( -x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
c)-2.( 15-3x )-4.( -7x+8 )=-5-9.( -2x+1 )
d)5.( -3x-7 )-4.( -2x-11 )=7.( 4x+10 )+9
e)4( x-2 )2-13=( -3 )2.2-11.( -3 )
f)-52-( 2x-1 )3=( -13 ).( -3 )
Tình hợp lý nếu có thể :
-5/2x 2/11+-5/7x 9/11+15/7
Tìm x biết:
(2x-15)mũ 5=(2x-15)mũ 3
Bài 1 : Tìm x thuộc Z
a , ( 2x + 1 ) . ( 2x-3) = 7
b, x.( x - 7 ) + 3 . ( x - 7 ) = 11
