Answer :

An equation is formed of two equal expressions. The given equation can be completed as -20-(-12)=-20+12.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

For the given equation, if the left side of the equation is simplified, then we can get the right side of the equation, therefore, the equation will be,

-20 - (-12)

= -20 -1(-12)  

= -20 + (-1 × -12)

= -20 + 12

Hence, the given equation can be completed as -20-(-12)=-20+12.

Learn more about Equation here:

https://brainly.com/question/14686792

#SPJ1