x uchun yechish
x=15
Grafik
Baham ko'rish
Klipbordga nusxa olish
280x+60\left(145-5x\right)=8400
Tenglamaning ikkala tarafini 7 ga ko'paytirish.
280x+8700-300x=8400
60 ga 145-5x ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
-20x+8700=8400
-20x ni olish uchun 280x va -300x ni birlashtirish.
-20x=8400-8700
Ikkala tarafdan 8700 ni ayirish.
-20x=-300
-300 olish uchun 8400 dan 8700 ni ayirish.
x=\frac{-300}{-20}
Ikki tarafini -20 ga bo‘ling.
x=15
15 ni olish uchun -300 ni -20 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}