SOLUTION: My daughter has just started pre-algebra has homework and did not get to bring home book and father was not sure if he was telling her right. The problem is 6d+d+15

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Question 19536: My daughter has just started pre-algebra has homework and did not get to bring home book and father was not sure if he was telling her right. The problem is 6d+d+15
Answer by MelanieBCC(40) About Me  (Show Source):
You can put this solution on YOUR website!
First. turn it into an equation: 6d%2Bd%2B15 becomes 6d%2Bd%2B15=0
Next, collect terms to get 7d%2B15=0 and use inverse operations to put constants on one side and variable on the other 7d%2B15-15=0-15 which becomes 7d=-15, then inverse operations again 7d%2F7=-15%2F7 which becomes d=-15%2F7
A friend of mine who had trouble with this stuff said that it helped a lot when a teacher explained it like this:
The equal sign is like a fence between two neighbors. The Constants are the numbers that live in the one house, and the Variable is Mr. X, that crabby, cranky guy that doesn't want anyone in his yard. He wants to be left alone and is not happy until he's by himself. It's a little silly and simplistic, but it works for equations of one variable (as well as the inequalities) and might help.