SOLUTION: why is the solver just addition? why isnt there a choice for subtraction

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Question 23518: why is the solver just addition? why isnt there a choice for subtraction
Found 3 solutions by MathNerdette, elima, mathtech5:
Answer by MathNerdette(3) About Me  (Show Source):
You can put this solution on YOUR website!
I do not know

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
You need to post an equation as an example. We are not sure what you are asking.

Answer by mathtech5(4) About Me  (Show Source):
You can put this solution on YOUR website!
Instead of putting the subtraction sign, try making the number negative. Subtracting is the same as negative addition.