Решите уравнения (3 1/2х-1 5/14)*42=6 8,2: х+1 7/12=7 - вопрос №655556531215144268217127518 от gjgjggfasf 03.03.2021 14:04

Question

Математика: Решите уравнения (3 1/2х-1 5/14)*42=6 8,2: х+1 7/12=7 5/18

gjgjggfasf · Answer

А) (3 1/2х-1 5/14)×42=63 1/2х-1 5/14×42=63 1/2х-57=63 1/2х=6+573 1/2х=63х=63:3 1/2х=63:7/2х=63×2/7х=18б) 8,2х+1 7/12=7 5/188,2х=7 5/18-1 7/128,2х=7 10/36-1 21/368,2х=6 46/36-1 21/368,2х=5 25/36х=5 25/36:8,2х=180/36:8 2/10х=180/36:82/10х=180/36×10/82х=18/2952=9/1476=3/492=1/164...