Ta có: 3x+1=-7
nên 3x=-8
hay \(x=-\dfrac{8}{3}\)
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Ôn tập chương III
Các câu hỏi tương tự
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
\(\frac{1}{2}\left(3x-\frac{1}{2}\right)-\frac{1}{4}x=7\)
x.3 1/4+(-7/6).x-1 2/3=5/12
5 8/17:x+(-4/17):x+3 1/7:17 1/3=4/11
-1 5/27-(3x-7/9)^3=-24/27
3(x-1/2)-5(x+3/5)=-x+1/5
Bài 1: Tìm x, biếta) 3dfrac{1}{3} x+ 16dfrac{3}{4} -13,25b) 3dfrac{2}{7}.x - dfrac{1}{8} 2dfrac{3}{4} c) x : 4dfrac{1}{3} - 2,5d) (dfrac{3x}{7} + 1) : (-4) dfrac{-1}{28}giúp em
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Bài 1: Tìm x, biết
a) 3\(\dfrac{1}{3}\) x+ 16\(\dfrac{3}{4}\) = -13,25
b) 3\(\dfrac{2}{7}\).x - \(\dfrac{1}{8}\) = 2\(\dfrac{3}{4}\)
c) x : 4\(\dfrac{1}{3}\) = - 2,5
d) (\(\dfrac{3x}{7}\) + 1) : (-4) = \(\dfrac{-1}{28}\)
giúp em
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
Bài 1: Tìm x, biết:
a) 2/3x-1/5x =-7/30
b)-5/23.23/5< x < -13/17.34/13
bài 1 : tìm x biết ;
a) 2x + 3 = 5 b)(2x - 3)2= 9 c)3x + 4 = 2x - 7 d)(4x - 1)3= 27 e) (x - 7) . 2 =3(2x +4) f) 52x-1= 125 g) 3.(x + 6) - 2x = 3 + 12x
X+7/3x=2/3
7+(3x+2)\(^2\)=71