a)
4 . ( 2x + 7 ) - 3 . ( 3x - 2 ) = 24
8x + 28 - 9x + 6 = 24
34 - x = 24
x = 10
b)
3 ( x - 2 ) + 2x = 10
3x - 6 + 2x = 10
5x - 6 = 10
5x = 16
x = 16/5
a) 4 . ( 2x + 7 ) - 3 . ( 3x - 2 ) = 24
\(8x+28-9x+6=24\)
\(8x-9x=24-6-28\)
\(-x=-10\)
\(x=10\)
b) 3 ( x - 2 ) + 2x = 10
\(3x-6+2x=10\)
\(3x+2x=10+6\)
\(5x=16\)
\(x=\frac{16}{5}\)
học tốt !!!
Tìm x
a) -3 1/2 : (4/5-1/2x) = 2^2
b) 2x + 3x = 5
c) -2/3x - 1/3x = -2
d) -2/3 (x+1) - 1/2 = -1/3
Tìm x
2.(x-1)+3.(3x-2)=x-4
3.(4-x)-2.(x-1)=x+20
4.(2x+7)-3.(3x-2)=24
3.(x-2)+2x=10
Tìm x biết
a, (2x-5) +17=16
b,10-2.(4-3x)=-4
c,-12+3. (-x +7)=-18
d,24: (3x-2) = -3
e,2x + 12=3.(x-7)
g,2x2 -1=49
Tìm x
3x - 4(2x-7)=3x-3
3(2x-7)-(4-2x) =2x-1
(x-2).(2x+12)=0
tìm x
a.(2x-5)+17=6
b.-12+3(-x+7)=-18
c.-45:5.(-3-2x)=3
d.10-2(4-3x)=-4
e.24:(3x-2)=-3
Tìm số nguyên x
a) 0100 - (31 - x) = 40
b) 280 - (x - 140) : 35 = 270
c) ( 1900 - 2x) : 35 - 32 = 16
d) 2^2x-1 : 4 = 8^3
e) (x + 2)^5 = 2^10
f) (3x - 4) . (x - 1)^3 = 0
g) (-2x + 1)^2 = 49
h) 1+2+3+...+x = 78
tìm x để:
(x+3).(4-x)=(1-x).(x-7)
(2x-1).(x-1)=(x+2).(2x+3)
(4-x).(3-x)=(1-x).(10-x)
(x+1).(x+4)=(x+2).(x+3)
(1-3x).(x+4)=(x+2).(-3x+2)
Tìm số nguyên x, biết:
1) -16 + 23 + x = - 16
2) 2x – 35 = 15
3) 3x + 17 = 12
4) (2x – 5) + 17 = 6
5) 10 – 2(4 – 3x) = -4
6) - 12 + 3(-x + 7) = -18
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 )
