bài 1 : tìm x, biết:
A) X/3 - 1/2 = 1/5 B) x/5 + 1/2 = 6/10 c) x +3 /15 = 1/3 d) x -14/4 =1/4
đ) 1/2 x + 1/2 =5/2 n) -2/3 1/3 ( 2x -5 )=3/2 i) ( 3x -1) ( -1/2 x +5 ) =0 j) x-2/4 = 5+x/3
q) 3/x + 5 = 15% p) | x - 1/3 =5/6 m) 2| 1/2 x - 1/3 | - 3/2 = 1/4
z) ( 4,5 - 2 x) . ( -11/7) = 11/14 y) ( x/7 + 0,25 ) = -1/28
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1) tính hợp lí ( nếu có thể )
c) \(\dfrac{2}{-11}\). 6\(\dfrac{2}{7}\)+ \(\dfrac{3}{7}\):3 + 5 d) 1,75 : 5 + 2,5 . ( \(4^2\)- 4. 4,1)
2) tìm x
a) 1/2-x=-1/6 b) x+3,5=7,8-12,6:2 c) 7/35 = 35-x/-105
Bài 1:Tìm x
a, \(2.x-\frac{1}{2}=\frac{5}{4}-\frac{1}{2}.x\)
b, \(\frac{3}{4}-\frac{5}{2}.x=2-3.x\)
c, \(\frac{3}{2}.\left(x-\frac{1}{3}\right)-2\left(x-\frac{1}{2}\right)=3\)
d, \(\frac{4}{3}.\left(x-\frac{3}{2}\right)-3.\left(\frac{1}{3}.x+1\right)=6\)
Bài 1: Tính
1-2-+4+5-6-7+.... + 97-98-99+100
Bài 2:
a) -12. (x-5)+ 7 . (3-x) = 5
b) x + {(x-3) - [(x+3) - (- x - 2)]} = x
c) (x+3).(x mũ 2 - 4) = 0
d) (x-1).(3-y) = -7
e) xy + 4x - 2y= 8
f) 3x +4y -xy = 16
Giúp mk với các bạn mk cần gấp!! Thanks!!!
tìm x biết:...........giúp mk vs
a. x/5+1/2=6/10
b. x+3/15=1/3
c. x-12/4=1/2
d. 1/2x+1/2=5/2
e.-2/3-1/3(2x-5)=3/2
f. (3x-1)(-1/2x+5)=0
g. 1/2-2/3x=7/12
h. 3/4x+1/5=1/6
i. 17/12-|2x-3/4|=-7/4
a. 2/3x-1/2=1/10
b. 39/7:x=13
c. (14/5x-50):2/3=51
d. (x+1/2)(2/3-2x)=0
e. 2/3x-1/2x=5/12
g. (x.44/7+3/7)11/5-3/7=-2
h. x.13/4+(-7/6)x-5/3=5/12
i.93/17:x+(-4/17):x+22/7:52/3=4/11
j. 17/2-|2x-3/4|=-7/4
k. (x+1/5)^2+17/25=26/25
l. -32/27-(3x-7/9)^3=-24/27
làm đầy đủ theo các bước nhé
Tìm x biết :
a) \(^{\dfrac{4}{9}+x=\dfrac{5}{3}}\)
b)\(\dfrac{3}{4}.x=\dfrac{-1}{2}\)
c) \(\dfrac{3}{7}+\dfrac{5}{7}:x=\dfrac{1}{3}\)
d)\(3\dfrac{1}{4}:\left|2x-\dfrac{5}{12}\right|=\dfrac{39}{16}\)
Tìm x biết :
a, (3-7x)^2=1/4
b,(x-1)^2+(2x-1)^2=0
c,5^x+5^x+2=650
d,(5x-1) (2x-1/5)=0
e,1,25-|2,5-x|=1,75