Adding the X - Puzzle Classics - UniPuzzle

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PUZZLE CLASSIC #121

Adding the X

Adding the X

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EXPLANATIONS

Adding the X

line

170

+x

y

line

30

+x

z

y : z

3 : 1

x =

line

line

0

1

2

3

4

5

6

7

8

9

What number can be added to both 170 and 30 so that the resultant sums have a ratio of 3:1?