3/4:7/8=x:21/2 eching

$$\frac { 3 } { 4 } : \frac { 7 } { 8 } = x : \frac { 21 } { 2 }$$

x uchun yechish

$$x=9$$

Chiziqli tenglamalarni yechish bo'yicha qadamlar

\frac{3}{4} ni \frac{7}{8} ga bo'lish \frac{3}{4} ga k'paytirish \frac{7}{8} ga qaytarish.

$$\frac{3}{4}\times \frac{8}{7}=\frac{x}{\frac{21}{2}}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{3}{4} ni \frac{8}{7} ga ko‘paytiring.

$$\frac{3\times 8}{4\times 7}=\frac{x}{\frac{21}{2}}$$

\frac{3\times 8}{4\times 7} kasridagi ko‘paytirishlarni bajaring.

$$\frac{24}{28}=\frac{x}{\frac{21}{2}}$$

\frac{24}{28} ulushini 4 ni chiqarib, bekor qilish hisobiga eng past shartlarga kamaytiring.

$$\frac{6}{7}=\frac{x}{\frac{21}{2}}$$

Tomonlarni almashtirib, barcha oʻzgaruvchi shartlar chap tomonga oʻtkazing.

$$\frac{x}{\frac{21}{2}}=\frac{6}{7}$$

Ikkala tarafini \frac{21}{2} ga ko‘paytiring.

$$x=\frac{6}{7}\times \frac{21}{2}$$

Suratni maxrajga va maxrajini suratga ko‘paytirish orqali \frac{6}{7} ni \frac{21}{2} ga ko‘paytiring.

$$x=\frac{6\times 21}{7\times 2}$$

\frac{6\times 21}{7\times 2} kasridagi ko‘paytirishlarni bajaring.

$$x=\frac{126}{14}$$

9 ni olish uchun 126 ni 14 ga bo‘ling.

$$x=9$$