Question
Thu August 25, 2011 By:

when do we use principle of addition and principle of multiplications

Expert Reply
Thu August 25, 2011
To solve an equation you isolate the variable you are asked to solve for.The addition principle says that when a=b,a+c=b+c for any nymber c.
We use the addition principle to find the unknown variable.
Along the same lines,the multiplication principle says that if a=b and c is any number,a*c=b*c.
This principle is also used to help isolate the variable you are asked to solve for.
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