Ответ:
4+2×(х-1)=4
4+2х-2=4
2х-2=4-4
2х-2=0
2х=0+2
2х=2
х=2:2
х=1
4+2×(1-1)=4
4+0=4
4=4
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Ответ:
4+2×(х-1)=4
4+2х-2=4
2х-2=4-4
2х-2=0
2х=0+2
2х=2
х=2:2
х=1
4+2×(1-1)=4
4+0=4
4=4