Steps to solving equations: Simplify/combine the like terms Isolate the variable (Get the variable on one side Solve for the variable
-2y - 7 + 5y = 13 - 2y Simplify/Combine terms 3y -7 = 13 - 2y Isolate variable by adding 2y to both sides 5y - 7 = 13 Add 7 to both sides to get y alone on one side 5y = 20 Divide by 5 on both sides to solve for y y = 4 You can check your answer by replacing y with 4 in the original equation.
"Discrete" means the quantities can only assume specific (usually integer) values. It is contrasted with "continuous," which describes quantities that can assume any value in some range, not necessarily an integer value.*
