Let the original number be x.
Acc. to the question,
2x+1616=(2/5)x
or, 10x+8080=2x
or, 10x-2x= -8080
or, 8x= -8080
or, x= -8080/8
or, x = -1010
Therefore, the original number is -1010
You are suppose to subtract making it
X+7=13
-7=-7
______
X=6
58 212 2800 900
/ \ / \ / \ / \
29 2 2 106 700 4 3 300
/ \ / \ / \ / \
2 53 70 10 2 2 3 100
/ \ / \ / \
7 10 5 2 2 50
/ \ / \
5 2 5 10
/ \
5 2
The prime factors are in bold.
(-2, 4)
Hope this helps! If not I, truly sorry
The answer would be 75 width