No 17 and 19 aja Tolong bantuin!!!!

17. 5x + 1, jika 5x + 1 > 0
5x > -1
x >1/5
-(5x + 1), jika 5x + 1 < 0
x < 1/5

19. ax + b, jika ax + b > 0
ax > -b
x > -b/a
-(ax + b), jika ax + b < 0
x < -b/a