Question

$6x + 7.5 - x = 15$
$7x + 5.4 - 5x = 15$
помогитепжпжпж​

Answer 1

Пошаговое объяснение:

6х + 7.5 - х = 15

5х = 15 - 7.5

5х = 7.5

х = 1.5

7х + 5.4 - 5х = 15

2х = 15 - 5.4

2х = 9.6

х = 4.8