a) $6,5-9x>0,5\left(x+1\right)/\cdot 2$

$13-18x>x+1$

$-19x>-12$

$x<\frac{12}{19}$

b) $0,2\left(x+2\right)<4,4-x/\cdot 5$

$x+2<22-5x$

$6x<20$

$x<3\frac{1}{3}$