Question

Morgan is adding -12 +7. She writes the following

-12 +7 = ?
She wants to write – 12 as the sum of two integers so that the sum of one of the integers and 7 is equal to 0. How could morgan write -12 to complete this problem? Enter the integers in the box

Answer 1

x=-7

Explanation:

-12+7+x=-12

-12+7+x+12=-12+12 (add 12 to both sides)

7+x=0(simplify)

7+x-7=0-7(subtract 7 from both sides)

x=-7