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queenbee2994
21.10.2020 •
Mathematics
-f-5(2f-3) which expressions are equivalent
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Ответ:
-11+15
Step-by-step explanation:
let me know if you want a detailed explanation
also this could be wrong idk
good luck
Ответ:
Explanation:
let x and y be the two number.
Where:
(x + y)/2 = 18 => x + y = 18 x 2 = 36
and:
x - y = 10
Thus we get:
x + y = 36 (1)
x - y = 10 (2)
Add (1) and (2):
x + y + x - y = 36 + 10
2x = 46
x = 23
If x = 23
then x - y = 10
23 - y = 10
-y = -13
y = 13