(x-5)×9=162
раскроем скобки
9x-45 = 162
9x-207 = 0
9x = 207
x = 23
3×(x+2)+2x=31
3x + 6 + 2x = 31
3x + 2x = 31 – 6
5x = 25
x = 5
(x-5)×9=162
раскроем скобки
9x-45 = 162
9x-207 = 0
9x = 207
x = 23
3×(x+2)+2x=31
3x + 6 + 2x = 31
3x + 2x = 31 – 6
5x = 25
x = 5