n uchun yechish
n=5
Baham ko'rish
Klipbordga nusxa olish
-21n+49=-31-5n
-7 ga 3n-7 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
-21n+49+5n=-31
5n ni ikki tarafga qo’shing.
-16n+49=-31
-16n ni olish uchun -21n va 5n ni birlashtirish.
-16n=-31-49
Ikkala tarafdan 49 ni ayirish.
-16n=-80
-80 olish uchun -31 dan 49 ni ayirish.
n=\frac{-80}{-16}
Ikki tarafini -16 ga bo‘ling.
n=5
5 ni olish uchun -80 ni -16 ga bo‘ling.
Misollar
Ikkilik tenglama
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometriya
4 \sin \theta \cos \theta = 2 \sin \theta
Chiziqli tenglama
y = 3x + 4
Arifmetik
699 * 533
Matritsa
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
Simli tenglama
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differensatsiya
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Oʻngga
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Chegaralar
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}