4)*8=3 Заранее спасибо за ответы ^^...

August 2022 1 9 Report

упростите: 4/7а+5/21а-2/3а
/ - дробная черта
решите уравнение: (3 1/2х-1/4)*8=3
Заранее спасибо за ответы ^^

Answers & Comments

svetazuna 1) 4/7а + 5/21а - 2/3а = 12/21а + 5/21а - 14/21а = 3/21а = 1/7а,
2) (3 1/2х - 1/4) * 8 = 3
3 1/2х - 1/4 = 3 * 8 =24
3 1/2х = 24 + 1/4
7/2х = 97/4
14/4х = 97/4
х = 97/4 : 14/4 = 97/4 * 4/14
х = 97/14 = 6 13/14

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