Question

-0.9*(1.2-х)=1.8*(х+2.4)

Answer 1

-1,08+0,9х=1,8х+4,32 
0,9х=-5,4
х=-6

Answer 2

-1.08+0.9х=1.8х+4.32
0.9х-1.8х=4.32+1.08
-0.9х=5.4
х=-6