Find two numbers a a and b b whose sum a + b a+b is 0 and whose difference a − b a-b is 2. your answer is

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step-by-step explanation:

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9