Step 1: Distribute -1.8 to the terms inside the parentheses.
2x - 1.8x + 5.4 = -3.2
Step 2: Combine like terms.
0.2x + 5.4 = -3.2
Step 3: Isolate the term with x.
0.2x = -3.2 - 5.4
0.2x = -8.6
Step 4: Solve for x.
x = -8.6 / 0.2