how to solve 3m+9=3/2?

Subtract 9 or 18/2 from both sides.
3m=-15/2
Divide by 3 or multiply by 1/3 on both sides.
m=-15/6
Then simplify m=-5/2

3m = 3/2 - 18/2
3m = - 15/2
m = - 5/2

3m + 9 = 3/2
2(3m + 9) = 2(3/2)
2*3m + 2*9 = 6/2
6m + 18 = 3
6m = 3 - 18
6m = -15
m = -15/6
m = -2 1/2 (-2.5)

3m = 3/2 - 9
3m = - 7 1/2
m = - 2 1/2

it should be easier if u multiply every thing by 2 like this
2(3m+9)=2(3/2)
and it come to
6m + 18= 6 and the 2's canceled from here i think u know...
subtract 18 to both sides its
6m = 12 the u divide 6 to both sides so its
m=2

ps. i did all the work and explain it vote for me as best answer, please....