x uchun yechish
x=6
Grafik
Baham ko'rish
Klipbordga nusxa olish
9x=2\left(x+21\right)
x qiymati -21 teng bo‘lmaydi, chunki nolga bo‘lish mumkin emas. Tenglamaning ikkala tarafini 9\left(x+21\right) ga, 21+x,9 ning eng kichik karralisiga ko‘paytiring.
9x=2x+42
2 ga x+21 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
9x-2x=42
Ikkala tarafdan 2x ni ayirish.
7x=42
7x ni olish uchun 9x va -2x ni birlashtirish.
x=\frac{42}{7}
Ikki tarafini 7 ga bo‘ling.
x=6
6 ni olish uchun 42 ni 7 ga bo‘ling.
Misollar
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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}