z=15/4-5/2*7/5= eching

$$z = \frac{ 15 }{ 4 } - \frac{ 5 }{ 2 } \times \frac{ 7 }{ 5 } =$$

z uchun yechish

$$z=\frac{1}{4}=0,25$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{5}{2} ni \frac{7}{5} ga ko‘paytiring.

$$z=\frac{15}{4}-\frac{5\times 7}{2\times 5}$$

Surat va maxrajdagi ikkala 5 ni qisqartiring.

$$z=\frac{15}{4}-\frac{7}{2}$$

4 va 2 ning eng kichik umumiy karralisi 4 ga teng. \frac{15}{4} va \frac{7}{2} ni 4 maxraj bilan kasrlarga aylantirib oling.

$$z=\frac{15}{4}-\frac{14}{4}$$

\frac{15}{4} va \frac{14}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$z=\frac{15-14}{4}$$

1 olish uchun 15 dan 14 ni ayirish.

$$z=\frac{1}{4}$$

z'ni tayinlash

$$z≔\frac{1}{4}$$