Simplify and solve this equation: 4m+9+5m-12=42

You first must add together the same values

So

4m+5m=9m

+9+-12 = -3

So you have

9m-3=42

Then you put the - 3 on the other side you you add 3 in to both sides so now you have

9m = 45

And then divide 45 divided by 9 = 5

So the answer is m=5

First you combine like variables

9m - 3 = 42

then add both sides

9m = 45

then divide whats left

m = 5