Question 66450
1.2x + 4.3 = 2.1 - x
+x               + x
_____________________
2.2x + 4.3 = 2.1
     - 4.3  -4.3
_________________
2.2x = -6.4

Then divide 2.2x by 2.2, and -6.4 by 2.2. And you get your answer.