Mathematics
Ashley99
2015-11-04 02:15:15
it is given 2m-n=11 and m+2n=-2.calculate the value of m+n
ANSWERS
amandapanda7171
2015-11-04 05:07:15

First Equation, 2m - n = 11 n = 2m - 11 Second Equation, m + 2n = -2 m + 2(2m - 11) = -2 m + 4m - 22 = -2 5m = -2 + 22 5m = 20 m = [latex] frac{20}{5} [/latex] m = 4 From first equation, n = 2m - 11 n = 2*4 - 11 n = 8 - 11 n = -3 Hence, m + n = 4 + (-3) = 4 - 3 = 1 Hence, the answer is 1.

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