a uchun yechish
a=-\frac{2\left(b-15\right)}{b+1}
b\neq -1
b uchun yechish
b=-\frac{a-30}{a+2}
a\neq -2
Baham ko'rish
Klipbordga nusxa olish
ab+a=30-2b
Ikkala tarafdan 2b ni ayirish.
\left(b+1\right)a=30-2b
a'ga ega bo'lgan barcha shartlarni birlashtirish.
\frac{\left(b+1\right)a}{b+1}=\frac{30-2b}{b+1}
Ikki tarafini b+1 ga bo‘ling.
a=\frac{30-2b}{b+1}
b+1 ga bo'lish b+1 ga ko'paytirishni bekor qiladi.
a=\frac{2\left(15-b\right)}{b+1}
30-2b ni b+1 ga bo'lish.
ab+2b=30-a
Ikkala tarafdan a ni ayirish.
\left(a+2\right)b=30-a
b'ga ega bo'lgan barcha shartlarni birlashtirish.
\frac{\left(a+2\right)b}{a+2}=\frac{30-a}{a+2}
Ikki tarafini a+2 ga bo‘ling.
b=\frac{30-a}{a+2}
a+2 ga bo'lish a+2 ga ko'paytirishni bekor qiladi.
Misollar
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