Answer :

ANSWER

x = 10

EXPLANATION

We want to find the missing box in the statement given.

Let the box be represented by x:

[tex]x\text{ + (-7) = 3}[/tex]

To solve this, move (-7) to the other side, the sign changes:

[tex]\begin{gathered} x\text{ = 3 + (+7)} \\ x\text{ = 3 + 7} \\ x\text{ = 10} \end{gathered}[/tex]

The box is 10.

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