\(3\cdot\left(x-\dfrac{1}{2}\right)-5\cdot\left(x+\dfrac{3}{5}\right)=-x+\dfrac{1}{5}\\ \left(3x-\dfrac{3}{2}\right)-\left(5x+3\right)=-x+\dfrac{1}{5}\\ 3x-\dfrac{3}{2}-5x-3=-x+\dfrac{1}{5}\\ 3x-5x+x=\dfrac{1}{5}+\dfrac{3}{2}+3\\ -x=\dfrac{47}{10}\\ x=\dfrac{-47}{10}\)
Tìm x biết
a ) ( 2x - 1 ) . ( 5x + 2 ) = 0
b ) 3/7 + 3/7 : x = -1/2 - ( -3/4 )
c ) ( 3x + 5 ) . ( 2x - 3 ) < 0
2) Tìm x:
a)(-5)^2 - (5x - 3)= 4^3
b)3x -17=x+3
c)5^x +5^x+2 = 650
AI NHANH MÌNH TICK CHO :)
TÌm x, biết:
a, 512-(128-5x)=3x+12
b, (2x-1)+(4x-2)+...+(400x-200)=5+10+...+1000
c, (x+2)+(4x+4)+(7x+6)+...+(25x+18)+28x+20)=1560
d, x+4x+5x+9x+14x+...+97x=500
e, 720-[41-(2x-5)]=23.5
f, 697:\(\dfrac{15x+364}{x}\)=17
Bài 2: Tìm x biết:
a) \(|3x-5|+3x=5\)
b)\(|5x-4|=|x+2|\)
c) 7,5 -3 \(|5-2x|=-4,5\)
d) \(|x-1,5|+|2,5-x|=0\)
e) \(|x.\left(x^2-\dfrac{9}{4}\right)|=x\)
f) 2x -\(|2x-1|=1\)
n) \(|2x-5|+|3x+7|=8\)
GIÚP MÌNH NHÉ GẤP LẮM ĐÓ!
Tìm x thuộc Z:
1.x2 -5x=0
2.|x-9|.(-8)=-16
3.|4-5x|=24 với x< hoặc= 0
4.x.(x-2)>0
5.x.(x-2)<0
6. (x-1).(y+1)=5
7.x(y+2)=-8
8.xy-2x-2y=0
9.2x-5 chia hết cho x-1
(1-3x)+(x-3)=(5x-1)-(5x+3)
tìm x
a)-5.(-x+7)-3.(-x-5)=-4.(12-x)+48
b) (-x-7)-5.(-x-3)=12.(3-x)
c)-2.(15-3x)-4.(7x+8)=-5-9.(-2x+1)
d) (-3x-7) - 4.(-2x-11)=7.(4x+10)+9
x/y=2/3 và 5x - 3y=4
x-1/y+2=1/2 va 3x-y=9
tìm x
a, 100-7(x-5)=31+3 mũ 3
b, 12(x-1) : 3 = 4 mũ 3 + 2 mũ 3
c, 24+5x=7 mũ 5 : 7 mũ 3
5x-206 = 2 mũ 4 . 4
125=x mũ 3
64=x mũ 2
giúp mik nha!!!!!!!!!!!!!
