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

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

z uchun yechish

$$z = -\frac{13}{4} = -3\frac{1}{4} = -3,25$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

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

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

Surat va maxrajdagi ikkala 5 ni qisqartiring.

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

2 va 2 ni qisqartiring.

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

7 ni \frac{28}{4} kasrga o‘giring.

$$z=\frac{15}{4}-\frac{28}{4}$$

\frac{15}{4} va \frac{28}{4} da bir xil maxraji bor, ularning suratini ayirish orqali ayiring.

$$z=\frac{15-28}{4}$$

-13 olish uchun 15 dan 28 ni ayirish.

$$z=-\frac{13}{4}$$

z'ni tayinlash

$$z≔-\frac{13}{4}$$