Jika 9m-1 + 9m+1 = 82 , maka 4m+1 = ......

9 m - 1 + 9 m + 1 = 82
18 m = 82
m = 82/18
m = 4,5

4(4,5) + 1 = 18 + 1 = 19

semoga membantu

9m - 1 + 9m +1 = 82
18m = 82 - 0
18m = 82
m = 82 ÷ 18
m = 4,5
4m + 1 = 4 (4,5) + 1
            = 18 + 1
           = 19