From words to algebra
From words to algebra
A variable is a letter such as xxx that stands for an unknown number. An expression is something like 3x+53x+53x+5, while an equation says two expressions are equal, like 3x+5=203x+5=203x+5=20.
From words to algebra
From words to algebra
A variable is a letter such as xxx that stands for an unknown number. An expression is something like 3x+53x+53x+5, while an equation says two expressions are equal, like 3x+5=203x+5=203x+5=20.