Ответ:
2/7х×21=-5
6х=-5
х=-5/6
х-4/25=17×6/25
х-4=17×6
х-4=102
х=106
3у=6×17.5
3y=105
y=35
x-1.8/21=2.4/7
7x-0.6=2.4
7x=3
x=3/7
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Ответ:
2/7х×21=-5
6х=-5
х=-5/6
х-4/25=17×6/25
х-4=17×6
х-4=102
х=106
3у=6×17.5
3y=105
y=35
x-1.8/21=2.4/7
7x-0.6=2.4
7x=3
x=3/7