0,3х+0,7х=1х
1х+6,2х=7,2х
7,2х:9=0.8х
5у-0.8у=4.2 у
0.3у х 4.2у=1.26у
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0,3х+0,7х=1х
1х+6,2х=7,2х
7,2х:9=0.8х
5у-0.8у=4.2 у
0.3у х 4.2у=1.26у