0.4m+3n=1.2,7m-2n=17/2 solve by elimination metod​

multiply 2nd by 3 and 1st by 2

0.8m + 6n = 2.4

21m - 6n = 25.5

by adding both equations we get,

21.8m = 27.9

m = 1.27

putting in second

7(1.27) - 2n = 8.5

8.89 - 8.5 = 2n

0.39/2 = n

n = 0.19