Tìm x
1; 5.| x + 2|= 10. (-2)
2; - 4| x - 2| = 8
3; 2. ( x - 5) - 3. ( x + 7) = 12
4; 7. ( 5 - x ) - 2. ( x + 3 ) = 15
giải nhanh giúp mình với ạ 1) TÍNH: a) -9/34: 17/4 ; b) 1/1/2(hỗn số) . 1/24 ; c) -5/2: 3/4 ; d) 4/1/5 : (-2/4/5) 2) TÍNH: a) 3/5 + (-4/3) + ( -3/4) ; b) -7/2 + ( -2/3) + (-3/5); c) 3/4 - [(-5/3) - (1/12 + 2/9)] 3) TÌM x : a) 11/12 - (2/5+x) = 2/3 4) a) ( -3/4 + 2/5 ) : 3/7 + ( 3/5 + -1/4 ) : 3/7 b) 7/8 : ( 2/9 - 1/18 ) + 7/8 : ( 1/36 - 5/12 )
tìm x biết
a,4/3x-1/+/x/-2/x-5/+7/x-3/=12
tìm x thuộc Z biết
-12(x - 5) + 7(3 - x) = 5
(x - 2).(x + 4) = 0
Thực hiện phép tính :
a) \(\dfrac{5}{12}x^{^{ }4}+\dfrac{7}{12}x^4\)
b) \(2x^5y^3+4x^5y^3-\dfrac{1}{2}x^5y^3\)
Tìm x biết:
a) 3./x/=x+12
b)/x/=2.x-1
c) /2.x-1/=x+4
d) /x-3/-x=7
e) /x-3/=x-1
f) /2.x-6/+5.x=9
g) /2.x-8/+4.x=10
h) /2.x-1/+3.x=5
2 TÌM X BIẾT
a, (5x+1)^2 = 36/49
b, (12/25)^x =(5/3)^2 -(-3/5)^4
c, (-3/4)^ 3x-1 = 256/81
d, 172 .x ^2 -7^9 :98^3 =2^3
e,5^x .(5^3)^2 =625
f, (x-2/9)^3 =(2/3)^6
Tìm x :
\(\dfrac{2}{3x}-\dfrac{3}{12}=\dfrac{4}{5}-(\dfrac{7}{x}-2)\)
a) \(\left|x+\dfrac{1}{4}\right|-4=-2\)
b) \(-\dfrac{15}{12}x+\dfrac{3}{7}=\dfrac{6}{5}x-\dfrac{1}{2}\)
Câu 2. Tìm x,y
a) \(\frac{3}{4}-x=\frac{1}{5}\)
b) \(\left|x+\frac{2}{5}\right|-\frac{3}{7}=\frac{4}{7}\)
c) \(\left(x+\frac{1^{^3}}{3}\right):2=-\frac{1}{16}\)
d)\(\frac{x+2}{3}=\frac{12}{x+2}\) (với x \(\ne\)-2)