x uchun yechish
x=-\frac{10}{13}\approx -0,769230769
Grafik
Baham ko'rish
Klipbordga nusxa olish
21x=2\left(4x-5\right)
Tenglamaning ikkala tarafini 14 ga, 2,7 ning eng kichik karralisiga ko‘paytiring.
21x=8x-10
2 ga 4x-5 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.
21x-8x=-10
Ikkala tarafdan 8x ni ayirish.
13x=-10
13x ni olish uchun 21x va -8x ni birlashtirish.
x=\frac{-10}{13}
Ikki tarafini 13 ga bo‘ling.
x=-\frac{10}{13}
\frac{-10}{13} kasri manfiy belgini olib tashlash bilan -\frac{10}{13} sifatida qayta yozilishi mumkin.
Misollar
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\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]
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