Answer:
x=2
Step-by-step explanation:
1.1x+1.2x-5.4=-10
1.1x+1.2x-5.4+5.4=-10+5.4
1.1x+1.2x=-4.6
2.3x=4.6
2.3x/2.3=4.6/2.3
x=2 :)