Algebra | more ... |
 In Algebra we use letters (like x or y) or other symbols in place of unknown values. For example: in x + 3 = 7, "x" is unknown. We can find the value of "x" by subtracting 3 from both sides of the equal sign (=), like this: Start with: x + 3 = 7 Subtract 3 from both sides: x + 3 - 3 = 7 - 3 Calculate: x + 0 = 4 Answer: x = 4 | |