2,3у+31+2,5у=67. 13+3,2х+0,4=40

2,3у+31+2,5у=674,8у=67-314,8у=36у=36:4,8у=7,5.....................13+3,2х+0,4=403,2х=40-13-0,43,2х=26.6х=8,3125