how do solve multi step proportions?

Question

I need help on solving multi step equations can you please help me here's an example
m+12 over 9m = 5 over 9
sorry i cant do fractions on the computer and also how do you check it to see if its right

Answer 1

m+12/9m = 5/9>>>> m+12 = 5m = >> 4m = 12

m = 3

Answer 2

m + 12/9 = 5/9
m = -7/9 because -7 + 12 =5

Answer 3

(m + 12)/(9m) = 5/9

9(m + 12) = 5(9m) {cross multiply}

m + 12 = 5m {divide both sides by 9}

12 = 4m {subtract m from both sides}

3 = m {divide both sides by 4}

Answer 4

(m + 12)/(9m) = 5/9

9(m + 12) = 5(9m) {cross multiply}

m + 12 = 5m {divide both sides by 9}

12 = 4m {subtract m from both sides}

3 = m {divide both sides by 4}

Answer 5

write it as
(m+12)/(9m) = (5/9)
multiply both sides by the (9m)
(m+12) = (5/9) * (9m)
m+12 = 5m
subtract m from both sides
12 = 6m
2 = m