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Negative seven plus negative seven is negative fourteen.
Five minus seven is negative two. Here's a trick: switch the numbers around and then take your answer. Give it a minus sign.
-2 + (-5) = -7 This is also written as -2 -5 = -7
7+1=8 Eight, the sum of these two numbers, is a positive number. The only way these two specific numbers could combine to create a positive number would be if they were both negative, if seven was negative or if they were multiplied together and one was a negative number.
Thirty seven and negative fifteen 37 and -15