a)x+1909=2050

=>x=2050-1909

=>x=141

b)x-586=3705

=>x=3705+586

=>x=4291

c)8462-x=762

=>x=8462-762

=>x=7700

x + 1909 = 2050

x = 2050 - 1909

x = 141

x - 586 = 3705

x = 3705 + 586

x = 4291

8462 - x = 762

x = 8462 - 762

x = 7700

x + 1909 = 2050

x = 2050 - 1909

x = 141

x - 586 = 3705

x = 3705 + 586

x = 4291

8462 - x = 762

x = 8462 - 762

x = 7700

a) \(x=-\dfrac{3}{5}\times\dfrac{9}{7}=-\dfrac{27}{35}\)

b) \(x\left(0,4-\dfrac{1}{5}\right)=\dfrac{3}{4}\)

\(x=\dfrac{3}{4}:\dfrac{1}{5}=\dfrac{15}{4}\)

a, \(x=-3,5.\dfrac{9}{7}=-\dfrac{9}{2}\)

b, \(\dfrac{2}{5}x-\dfrac{1}{5}x=\dfrac{3}{4}\Leftrightarrow\dfrac{1}{5}x=\dfrac{3}{4}\Leftrightarrow x=\dfrac{3}{4}:\dfrac{1}{5}=\dfrac{15}{4}\)

x=\(\dfrac{9}{7}x-3.5\)

x=\(\dfrac{-9}{5}\)

Mình giải bạn tick cho mình nha

=>a=x-a hoặc a=a-x

=>x=2a hoặc x=0

ban giai chi tiet duoc ko

  |x - a| = a

nên x-a=a hoăc x-a=(-a)

      x=2a hoăc  x=0

\(A=\dfrac{x-3-2}{x-3}=1-\dfrac{2}{x-3}\)

A max khi -2/x-3 max

=>2/x-3 min

=>x-3=-1

=>x=2

\(a,\Rightarrow1485,925-x-225=755\)

\(\Rightarrow1485,925-x=755+225\)

\(\Rightarrow1485,925-x=980\)

\(\Rightarrow x=1485,925-980\)

\(\Rightarrow x=505,925\)

\(b,\Rightarrow\left(9-5,34\right):x=3\)

\(\Rightarrow3,66:x=3\)

\(\Rightarrow x=3,66:3\)

\(\Rightarrow x=1,22\)

A max khi x+3=1

=>x=-2

Nhi ak dũng đây

C

C

C

`x/2=2/x`

`=>x.x=2.2`

`=>x^2=4`

`=>x=+-2`