1.1x + 1.2x-5.4=-10, What steps do I do to solve this

First, add the like terms (1.1x and 1.2x). Your equation will look like

2.3x-5.4 = - 10

Then, isolate the variable on one side by adding 5.4 to both sides. It will look like

2.3x = - 4.6

Finally, isolate x by dividing by 2.3 on both sides. It will look like

x = - 2