a)21/4+x=-0,5%
5,25+x=-50
x=-50-5,25
x=-55,25
b)2x2-72=0
2x2=0+72
2x2=72
x2=72/2
x2=36
x=62=(-6)2
x={6;-6}
a)21/4+x=-0,5%
5,25+x=-50
x=-50-5,25
x=-55,25
b)2x2-72=0
2x2=0+72
2x2=72
x2=72/2
x2=36
x=62=(-6)2
x={6;-6}
2x2-72 =0
(3/5x -0,75 ) : 3/7 =2 và 4/5
2x +3/10 =1 và 5/6 .6/11
2 và 1/4 : (x-7 và 1/3 ) = 1,5
bài 1 tìm x
a. 5 - 3(x+4) = -1
b.(x-1) - (x+2) = 0
c.( \(\dfrac{1}{2}\) + x )-( \(\dfrac{1}{3}\) - x) = 0
d. 2x2 - 3 = 5
e. x(2x -1) = 0
g. \(\dfrac{1}{3}\) . x2 - \(\dfrac{1}{6}\)=\(\dfrac{7}{6}\)
Tìm x
(3/5x-0,75):3/7=14/5
Tìm x biết (3/5x-0,75) . 3/7=14/5
Tìm x biet:
a,93/17:x+(-21/17):x+22/7:22/3=5/14
b,-32/27-(3x-7/9)^3=-24/27
c,[(3,75:1/4)+12/5.125%)-(7/2.0,8-1,2:3/2)]:(3/2+0,75)x=64
b1 tìm x ,biết
(x-14)-20=5
128+(202-x)=330
(x-120)*9=450
x-320:32=25*16
25-(2x+10)=5
315-(135-x)=215
x:2+21:3=37
4*(x+100)=800
504:(16-5x)=72
(x-5):7+3=20
mik cảm ơn nhaa
Tìm x thuộc Z:
a) -17 . |x| = -51
b) -7 .|x + 3| = -7^2
c) 4.x - 15 = -75 - x
d) 72 - 3x = 5x = 8
e) ( x - 2)^2 + 5 = 21
Tìm x
a) -x/27 -1 = 2/3
b) x - 4 = -14/35 : 20/-21
c) x + 2/3 = -1/12 . -4/5
d) 1/5 - 3/5x = -15/14 :20/-21
e) -3/7x = 3/5 . 28/9
f)1/2x + 3/5x = -2/3
a)\(\dfrac{2}{3}\)x-1=\(\dfrac{3}{2}\)
b)| 5x - \(\dfrac{1}{2}\)| - \(\dfrac{2}{7}\)= 25%
c)\(\dfrac{x-3}{4}\)=\(\dfrac{16}{x-3}\)
d)\(\dfrac{-8}{13}\)+\(\dfrac{7}{17}+\dfrac{21}{31}\)<x≤\(\dfrac{-9}{14}\)+4+\(\dfrac{5}{-14}\)(xϵZ)