a uchun yechish
a=\frac{4\left(b+20\right)}{5}
b uchun yechish
b=\frac{5\left(a-16\right)}{4}
Baham ko'rish
Klipbordga nusxa olish
5a-4b=80
Tenglamaning ikkala tarafini 20 ga, 4,5 ning eng kichik karralisiga ko‘paytiring.
5a=80+4b
4b ni ikki tarafga qo’shing.
5a=4b+80
Tenglama standart shaklda.
\frac{5a}{5}=\frac{4b+80}{5}
Ikki tarafini 5 ga bo‘ling.
a=\frac{4b+80}{5}
5 ga bo'lish 5 ga ko'paytirishni bekor qiladi.
a=\frac{4b}{5}+16
80+4b ni 5 ga bo'lish.
5a-4b=80
Tenglamaning ikkala tarafini 20 ga, 4,5 ning eng kichik karralisiga ko‘paytiring.
-4b=80-5a
Ikkala tarafdan 5a ni ayirish.
\frac{-4b}{-4}=\frac{80-5a}{-4}
Ikki tarafini -4 ga bo‘ling.
b=\frac{80-5a}{-4}
-4 ga bo'lish -4 ga ko'paytirishni bekor qiladi.
b=\frac{5a}{4}-20
80-5a ni -4 ga bo'lish.
Misollar
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