Answer :

[tex]1.1x+1.2-5.4=-10 \\ \\ 1.1x-4.2=-10 \\ \\ 1.1x= -10+4.2 \\\\ 1.1x=-5.8 \\\\ \boxed{x=-\frac{5.8}{1.1}=-5.(27)}[/tex]

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