\(8^x+2^{3x+1}=24\)
\(\left(2^3\right)^x+2^{3x}.2=24\)
\(2^{3x}+2^{3x}.2=24\)
\(2^{3x}.\left(1+2\right)=24\)
\(2^{3x}.3=24\)
\(2^{3x}=24:3\)
\(2^{3x}=8\)
\(\Rightarrow2^{3x}=2^3\)
\(\Rightarrow3x=3\)
\(x=3:3\)
\(x=1\)
Vậy \(x=1\)
Tìm x :
1) (2x - 5 ) + 17 = 6
2) 10 - 2(4 - 3x) = -4
3) -12 + 3(-x + 7) = -18
4) 24 : (3x - 2) = -3
5) -45 : 5 . (-3 - 2x) = 3
Tìm x biết
a, (1/2 - 3x ) ÷ 11/5 - ( -3/2) = -7
b, 2/3 × ( x + 1/2 ) + 1/2 ( 3x + 2/5 ) = 8/15
I; chuyển vế đổi dấu
a) -3x+4+5x=-10-x
b)-x+1=-3x-8
c)8-(x-1)=10+(x+5)
d)100+(x+7)-(-2x+3)=8+(x+100)
e) |2x+5|=|x-1|
g)|-x+4|=|-3x-8|
h)|x+4|=|-3-8|
I: chuyển vế đổi dấu , trong ngoặc , giá trị tuyệt đối
a) -3x+4+5x=-10-x
b)-x+1=-3x-8
c) 8-(x-1)=10+(x+5)
d)100+(x+7)-(-2x+3)=8+(x+100)
e)|2x+5|=|x-1|
g) |-x+4|=|-3x-8|
h) |x+4|=|-3x+8|
help me
1)tìm x
a)(x-7/18).18/29=-12/29
2)tính nhanh
a)0,25.2và1/3.30,05/8/45
b)(-3,3).-15/64+(0.8- "2và4/15");1và23/24
c)1 và 13/15.3.(0,5)2.3+(8/15-1và19/60):1và24/24
Tìm x biết :
a) 2x( x - 3) - 3x (3-x) =15 - 3x
b)(x+ 3 )3 = -8
c) (x + 1) x ( x + 2 ) < 0
d) ( x -3) x (x+2 )> 0
e (x2 + 1) x ( x+ 2)> 0
Câu 1:
a) -2x-(x-17)=34-(-x+25)
b) 17x-(-16x-27)=2x+43
c) -2x-3(x-17)=34-2(-x+25)
d) 17x+3(-16x-37)=2x+43-4x
e) 3x-32>-5x+1
f)15+4x<2x-145
g)-3(2x+5)-16<-4(3-2x)
h) -2x+15<3x-7<19-x
i)x+(x+1)+(x+2)+(x+3)+....+13+14=14
j)25+24+23+...+x+(x-2)+(x-3)=25
Câu 2:
a) (x-3).(y+5)=-17
b) (x+1).(xy-2)=11
c) xy-7x+y=-22
d) xy-3x+y=-20
Tìm x
a) 304/60 = 9/135-x
b) -1/2 + 16/124 + x -5/31=2/62
2/17 + 15/24 - 15/27 - x - 8/23 = 0
a. -3(x-5)+6(x-2)=9
b. 4x-5(-3+x)=7
c. 5(x-7)+10(3-x)=20
d. -4(x+1)+8(x-3)=24
