Question

What is equivalent to 4-(-7)

Answer 1

4 + 7
This is equivalent because you cannot subtract integers and must add the opposite for example
13 - (-10)
and when we add the opposite the question now looks like this
13 + 10
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Answer 2

= 4 + 7 
This is equivalent because you cannot subtract integers and must add the opposite for example 
=13 - (-10)
and when we add the opposite the question now looks like this
=13 + 10

Hope it helps!!