5.14
а) х+4=-5
х=-5-4
х=-9
5,15
а) х+4=2х
-2х+х=-4
-х=-4
х=4
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5.14
а) х+4=-5
х=-5-4
х=-9
5,15
а) х+4=2х
-2х+х=-4
-х=-4
х=4