Explanation: x + (6.9) = -2.9
x = -2.9
-6.9
x = -9.8
x-(-6.9)=-2.9
x+6.9=-2.9
Negative number and Negative number= Positive number
x+6.9-6.9=-2.9-6.9
x=-9.8
Answer is x=-9.8
