Question

3x≤18
a+15≤25
a·3≤105
7-x>2
432-x>427
     

Answer 1

3x<=18 / :3 x>=6
a+15<=25 a<=25-15 a<=10
7-x>2 x>7-2 x>5
432-x>427 x>432-427 x>5

Answer 2

$3x \leq 18\\x \leq 6\\a+15 \leq 25\\a \leq 10\\a*3 \leq 105\\ \leq 35\\7-x>2\\x<5\\432-x>427\\x<5$