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What has the sum of 21 and the difference of 7 answer

What has the sum of 21 and the difference of 7 answer
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5 votes
What has the sum of 21 and the difference of 7 answer

User Tomol
by
7.8k points

1 Answer

1 vote

Answer:

7

Explanation:

x

+

y

=

21

x

−

y

=

7

y

=

21

−

x

x

−

(

21

−

x

)

=

7

x

−

21

+

x

=

7

2

x

=

28

x

=

14

∴

14

+

y

=

21

y

=

7

User EazyC
by
8.5k points
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