Question

rezolvati in multimea q urmatoarele ecuatii:2x-5=7

Answer 1

2x=7+5
2x=12
x=12:2
x=6

Answer 2

2x-5=7 => 2x=5+7 => 2x = 12 => x = 12 : 2 => x = 6 => S = {6}