To get to 2a you need to have a small mushroom and on level 2-3 go up where all the coins are and jump up the side
Once you have got past the big spicky fish, don't bounce on the koopa next to the green pipe to get to the yellow pipe. Go through the green pipe, swim to the surface, and you will see the red flag.
On world 2-3 when you push the button to make the water come up go up the gap in the roof very fast, then above a lege on the left, there is another button be quick and hit that, you should get to the top and there'll be another gap, go down ther, happy playing!
On 2-3 hit the water switch and go to the coin section and there is another switch hit it also if you want to skip to the big castle at the end of the world you do 2A and you have to end with firworks, then you have to go through a pipe and your there! =]
Since the question is 3(2a), then just write it out. 3(2a) is 2a+2a+2a or 6a.
The multiplicative inverse of -2a is 1/(-2a) = -1/2a
2a+2a-7b+7b =4a
a-^2a-b^-a-b
The answer is 4a^2.
a + a + a - 2a = 3a - 2a = a
8b36
2a + 2b = c subtract 2a from both sides 2a - 2a + 2b = c - 2a 2b = c - 2a divide both sides by 2 (2/2)b = (c - 2a)/2 b = (c - 2a)/2 --------------------