Expanding the left-hand side of the equation, we get:
-2(x+2.8) = -2x - 5.6
Now we can substitute this expression into the original equation, giving:
-2x - 5.6 = 1.4
To solve for x, we need to isolate x on one side of the equation. We can do this by adding 5.6 to both sides:
-2x = 7
Finally, we can solve for x by dividing both sides by -2:
x = -3.5
Therefore, the value of x in the equation -2(x+2.8)=1.4 is -3.5.