Ответ:
2x+12=20
2x=20-12
2x=8
x=8:2
x=4
2х + 12 = 20
2x = 20 - 12
2x = 8
x = 8 : 2
x = 4
Ответ: x = 4
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Ответ:
2x+12=20
2x=20-12
2x=8
x=8:2
x=4
2х + 12 = 20
2x = 20 - 12
2x = 8
x = 8 : 2
x = 4
Ответ: x = 4