Question

5x - 4,5 = 3x + 2,5;
а) x = 12;

Answer 1

5х-4.5=3х+2.5 |-3х

2х-4.5=2.5 |+4.5

2х=7 |:2

х=3.5

Answer 2

5х - 4,5 = 3х + 2,5
5х - 3 х = 2,5 + 4,5
2х = 7
$x = \frac{7}{2} = 3.5$
Ответ: х = 3,5