(5Х-5)-(3Х+6)=7
5Х-5-3Х-6=7
2Х-11=7
2Х=7+11
2Х=18
Х=18÷2
Х=9
(5×9-5)-(3×9+6)=7
7=7
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5х-3х=7-6+5
2х=6
х=6:2
х=3
(5Х-5)-(3Х+6)=7
5Х-5-3Х-6=7
2Х-11=7
2Х=7+11
2Х=18
Х=18÷2
Х=9
(5×9-5)-(3×9+6)=7
7=7