The expression is .
To subtract -2 means add 2.
First locate 5 then 2 units to right.
The final position is 7
The sum is 7.
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. ![\"\"](\"/userfiles/image/steps_images/step2.JPG\")
![\"\"](\"/userfiles/image/graphpa9_p68.gif\")
![\"\"](\"/userfiles/image/steps_images/solution.JPG\")