5/7:x-1=2/3
5/7:x=2/3+1
5/7:x=5/3
x=5/7:5/3
x=3/7 ...
`5/7 : x-1=2/3`
`=> 5/7 : x= 2/3 +1`
`=> 5/7 : x= 2/3 +3/3`
`=> 5/7 : x= 5/3`
`=>x= 5/7 : 5/3`
`=> x= 5/7 xx 3/5`
`=> x= 15/35`
`=>x= 3/7`
1) (2x -3) (5/2 – x)=0
2) x – 12 = ½
3) (2x + 3/5)^2 -9/25 = 0
4) 7/3 x – 5/2 x = -1/3
5) ¾ + ¼ : x = 1
6) 1/3 + 2/5 (x+1) = 1
a)x+1/5=5/6.b)x-3/5=6/7.c)-x-7/5=-8/9.d)3/8-x=2/3.e)|x-8/9|=1/3
1/3*5 + 1/5*7 + 1/7*9 +...+1/ x(x+2)=11/75
1/3 x + 1/2 = -4/3
-2/3 - 4/3 x = -1/2
5/2 - 2 (x-1) = -2/3
7/-2 x - 1/3 = -1/2
8/5 - 1/2 : x = 8/3
-5/4 x - 1/2 x = -7/3
ét ô ét
Bài 1 : Tìm x
a) 3 . ( x + 7 ) + 2 . ( x - 5 ) = 26
b) 15 . ( x - 3 ) - 7 = 10 . ( x - 2 ) + 3
c) 3 . ( x + 5 ) - 2 . ( x - 7 ) = 18
Tìm x biết : a) -5/6-x=7/12+(-1)/3 b) 2.(x-1/3)=(1/3)^2+5/9 c) |2x-3/4|-3/8=1/8 d) 2/3x+1/6x=3 và 5/8
1.
a) 9/4 - 3/4 x 1/5
b0 2/5 x 1/3 x3/5
2.
a)x : 3/4 = 2 and 2/4 + 1 and 1/4
b)7/5 : x = 2/3 x 1/4
Tìm x
a,x/15=2/5
b,3/x-7=27/135
c,320.x-10=5.48:24
d,5.x-1952=2500-1947
e,(x+1)+(x+2)+(x+3)+(x+4)+(x+5)=45
f,x-2/3-2/15-2/35-2/63=1/9
g,(x-1.3/4).3/2.2+1/2-3/2=2
h,2/6+2/12+2/20+...+2/x.(x+14)=2013/2015
k,3+5+7+...+2015/2+4+6+...+2014+x=1
\(\frac{1}{4}+\frac{1}{3}\left(2x-1\right)=-5\)
\(\frac{2}{3}x-\frac{1}{2}=\frac{1}{10}\)
\(\left(x.6\frac{2}{7}+\frac{3}{7}\right).2\frac{1}{5}-\frac{3}{7}=-2\)
\(5\frac{4}{7}:x=13\)
\(\left(2\frac{4}{5}x-50\right):\frac{2}{3}=51\)
làm hộ mik nhanh vs ... mik chỉ còn 50p nữa là nộp pài r
(-2/5 + 1/3) x (3/2 - 3/7)
