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29.01.2020 •
Mathematics
If 4m-7n=10 and 2m+2n=4, what is the value of 2m-9n?
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Ответ:
2m + 2n = 4 - multiply everything by -1.
4m - 7n = 10
-2m - 2n = -4 Add the 2 equations
(4m - 7n = 10)
+(-2m - 2n = -4)
2m - 9 n = 6.
The value of 2m - 9n would be 6.
Ответ: