Ответ:
1)2х+5-4=15
2х=15-5+4
2х=14
х=7
2)2х+3+6=7
2х=7-3-6
2х=-2
х=-1
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Ответ:
1)2х+5-4=15
2х=15-5+4
2х=14
х=7
2)2х+3+6=7
2х=7-3-6
2х=-2
х=-1