\(\dfrac{5}{8x-2}=\dfrac{-4}{7-x}\)
\(\Leftrightarrow-4\left(8x-2\right)=5\left(7-x\right)\)
\(\Leftrightarrow-32x+8=35-5x\)
\(\Leftrightarrow-32x+5x=35-8\)
\(\Leftrightarrow-27x=27\)
\(\Leftrightarrow x=-1\)
a,X+1/2=3/4 b,4/5.X=4/7 c, 8X=7,8.X+25
tìm các số nguyên x , biết
a, ( x+7) . (x-15)
b, 8x + (-7) . x = -33
c, -12 . ( x - 5) + 7 . (3 - x) = 5
d,(-2) . (x +1) - (x - 5) = -2x
e, (-2) . x + 5 = (-3) . (-3) + 8
g, -12x = 15.(-4) - 12
1)5x+2(x+1/2)=7
2)8x-3(x+2)=9
3)5(x-2)+3(x-1)=19
4)7(x-3)-2x-5=11
x+ 1/2 = 3/4
b) 4/5.x = 4/7
c) 8x=7,8.x + 25
tìm x
a, | 5/4x - 7/2 | - | 5/8x + 3/5 | = 0
b, 21/5 + 3 : | x/4 - 2/3 | = 6
c,| 9 + x | = 2x
d, | 2x - 3 | + x = 21
e, | 7 - 2x | + 7 = 2x
f, | -x + 2/5 | + 1/2 = 3,5
G, | 3x - 4 | + 4 = 3x
a) x + 1/2 = 3/4
b) 4/5 . x = 4/7
c) 8x= 7,8x + 25
Tìm x biết:
a)(2x-3)-(x-5)=(x+7)-(x+2)
b)(7x-5)-(6x+4)+(2x+3)-(2x+1)
c)(9x-3)-(8x+5)=(3x+2)
d)(x+7)-(2x+3)=(3x+5)-(2x+4)
1 Tìm x:
a) 5.(1-x)-6.(1+x)=7.(3-x)
b) 2.(x+5)-3.(3x+7)=6.(1-x)+8x
c) x-2+3.(x-4)=5.(x-6)+7
d) x+2+3.(1-x)-5.(2-x)=6.(1-x)+7.(3x)
Tìm x
a,x+1/2=3/4
b, 4/5.x=4/7
c, 8x= 7,8+25
