решите уравнение -1,2x+5=3-0,4x
-1.2х+0.4х=3-5
-0.8х=-2
х=2:(-0.8)
х=-2.5
-1.2х+5=3-0.4х
-1.2х+0.4х=5-3
0.8х=-2
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-1.2х+0.4х=3-5
-0.8х=-2
х=2:(-0.8)
х=-2.5
-1.2х+5=3-0.4х
-1.2х+0.4х=5-3
0.8х=-2
х=-2.5