juliannabartra
02.08.2019 •
Mathematics
If 4m - 7n = 10 ans 2m + 2n = 4, then what is the value of 2m-9n
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Ответ:
4m - 7n = 10 (1)
2m + 2n = 4 (2)
(1)-(2)
4m - 7n - (2m + 2n) = 10-4
=>
2m-9n = 6
Ответ:
B.
Step-by-step explanation: