4,2х + 8,4 = 14,7;
4,2х = 14,7 - 8,4;
4,2х = 6,3;
х = 1,5.
13 + 3,2х + 0,4 = 40;
3,2х = 40 - 13 - 0,4;
3,2х = 26,6;
х = 8, 3125.
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Answers & Comments
4,2х + 8,4 = 14,7;
4,2х = 14,7 - 8,4;
4,2х = 6,3;
х = 1,5.
13 + 3,2х + 0,4 = 40;
3,2х = 40 - 13 - 0,4;
3,2х = 26,6;
х = 8, 3125.