Question

решить уравнение (2х+3)×6=78

Answer 1

.....12х+18=78
........12х=60
...........х=5

Answer 2

(2х + 3) × 6 = 78
12х + 18 = 78
12х = 78 - 18
12х = 60
х = 60 : 12
х = 5