franniecool14 franniecool14

06-02-2018
Mathematics

contestada

If 4m - 7n = 10 ans 2m + 2n = 4, then what is the value of 2m-9n

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mathmate mathmate

06-02-2018

Given:
4m - 7n = 10 .................(1)
2m + 2n = 4 ..................(2)

(1)-(2)
4m - 7n - (2m + 2n) = 10-4
=>
2m-9n = 6

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