3 (0,4х + 7) – 4 (0,8х - 3) = 2.
1,2х+21-3,2х-12=2 -2х=2+12-21 -2х=--7 х=3,5
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1,2х+21-3,2х-12=2 -2х=2+12-21 -2х=--7 х=3,5