108 : (x - 2) =6
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345x2-107x2=690-214=476 hoặc bạn nhóm 2 ra ngoài
425x3-17x3=1275-51=1124 hoặc nhóm 3 ra ngoài
108x6-108x2=648-216=432 hoặc nhóm 108 ra
:))))))))))) dễ mà
\(=\dfrac{x^3+2x^2+2x^2-72+108-6x}{2x\left(x+6\right)}\\ =\dfrac{x^3+6x^2-2x^2-12x+6x+36}{2x\left(x+6\right)}\\ =\dfrac{\left(x+6\right)\left(x^2-2x+6\right)}{2x\left(x+6\right)}=\dfrac{x^2-2x+6}{2x}\)
\(\dfrac{x^2+2x}{2x+12}+\dfrac{x-6}{x}+\dfrac{108-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x^2+2x}{2\left(x+6\right)}+\dfrac{x-6}{x}+\dfrac{108-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x\left(x^2+2x\right)+2\left(x+6\right)\left(x-6\right)+108-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x^3+2x^2+2\left(x^2-36\right)+108-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x^3+2x^2+2x^2-72+108-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x^3+4x^2+36-6x}{2x\left(x+6\right)}\)
\(=\dfrac{x^3+6x^2-2x^2-12x+6x+36}{2x\left(x+6\right)}\)
\(=\dfrac{\left(x^3+6x^2\right)+\left(-2x^2-12x\right)+\left(6x+36\right)}{2x\left(x+6\right)}\)
\(=\dfrac{x^2\left(x+6\right)-2x\left(x+6\right)+6\left(x+6\right)}{2x\left(x+6\right)}\)
\(=\dfrac{\left(x+6\right)\left(x^2-2x+6\right)}{2x\left(x+6\right)}\)
\(=\dfrac{x^2-2x+6}{2x}\)
\(6.\left(x-5\right)-12\left(x-3\right)-7\left(2-x\right)=-108\)
\(\Leftrightarrow6x-30-12x+36-14+7x=-108\)
\(\Leftrightarrow x=-100\)(Chuyển vế tất cả một bên là x và bên kia là số)
(Tớ chắc chắn là đúng, click cho tớ với nhá!)
a. x + 6 = 108 c. x * 6 = 108
x = 108 - 6 x = 108 : 6
x = 102 x = 18
b. x - 6 = 108 d. x : 6 = 108
x = 108 + 6 x = 108 x 6
x = 114 x = 648
ta gọi (2+4+6+...+100) la a
=a x (36x33-108x111)
=a x 11988-11988
=a x 0
=0
đừng quên k cho mình nha
\(\frac{x+110}{100}+\frac{x+8}{102}+\frac{x+6}{104}=\frac{x+4}{106}+\frac{x+2}{108}\)
\(\Leftrightarrow\frac{x+110}{100}+\left(\frac{x+8}{102}+1\right)+\left(\frac{x+6}{104}+1\right)=\left(\frac{x+4}{106}+1\right)+\left(\frac{x+2}{108}+1\right)\)
\(\Leftrightarrow\frac{x+110}{100}+\frac{x+110}{102}+\frac{x+110}{104}=\frac{x+110}{106}+\frac{x+110}{108}\)
\(\Leftrightarrow\frac{x+110}{100}+\frac{x+110}{102}+\frac{x+110}{104}-\frac{x+110}{106}-\frac{x+110}{108}=0\)
\(\Leftrightarrow\left(x+110\right)\left(\frac{1}{100}+\frac{1}{102}+\frac{1}{104}+\frac{1}{106}+\frac{1}{108}\right)=0\)
\(\Leftrightarrow x+110=0\) (vì \(\frac{1}{100}+\frac{1}{102}+\frac{1}{104}-\frac{1}{106}-\frac{1}{108}>0\))
\(\Leftrightarrow x=-110\)
Vậy \(x=-110\)
=> 131.( x - 37 ) = 0
=> x - 37 = 0 : 131
=> x - 37 = 0
=> x = 0 + 37
=> x = 37
131 . (x - 37) = ( 2 + 4 + 6 + ... + 100) . (36.333 - 108 .111)
=> 131 . (x - 37) = ( 2 + 4 + 6 + ... + 100) . (36.3.111 - 108 .111)
=> 131 . (x - 37) = ( 2 + 4 + 6 + ... + 100) . [111.(36.3 - 108)]
=> 131 . (x - 37) = ( 2 + 4 + 6 + ... + 100) . [111.0]
=> 131 . (x - 37) = 0
=> x - 37 = 0 . 131 = 0
=> x = 0 + 37 = 37
Vậy x = 37
\(\left(2+4+6+...+100\right)\left(36.333-108.111\right)=\left(2+4+6+...+100\right).\left[111\left(36.3-108\right)\right]=\left(2+4+6+...+100\right).0=0\)
(2+4+6+.......+100) (36 x 333 -108 X 111 )
=2x(1+2+3+......+50)[36x111(1x3-3x1)
=2x(1+2+3+......+50)(36x111x0)
=2x(1+2+3+......+50)x0
=0
108:(x-2)=6
x-2=108:6
x-2=18
x=20