2 years ago

The sum of two numbers is 23. The difference of the numbers is 7.4. What are the two numbers?

1 answer:

5 0

X+y=23
X-y=7.4

X+y=23
y=23-X

X-y=7.4
(23-y)-y=7.4
23-2y=7.4
-2y=-15.6
Y=7.8

X+y=23
X+7.8=23
X=15.2

Therefore the two numbers are 7.8 & 15.2

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