14(2-х)=7(3+х)
28-14х=21+7х
28-14х-21-7х=0
7-21х=0
-21х=0-7
-21х=-7
х=-7/-21=7/21
Х=7/21
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14(2-х)=7(3+х)
28-14х=21+7х
28-14х-21-7х=0
7-21х=0
-21х=0-7
-21х=-7
х=-7/-21=7/21
Х=7/21