3 m + 12 = 2 m + 20 - 2 what is m

Start by simplifying the right side:

3m + 12 = 2m + (20-2)

3m + 12 = 2m + 18

Now get m's on to one side:

3m + 12 = 2m + 18

-2m - 2m (Subtract 2m from both sides)

m + 12 = 18

Now get the constants on to the other side:

m + 12 = 18

-12 - 12

So:

m = 18-12

m=6