step by step explanation
A number is equal to the sum of twice the number and negative three. Look Out: be very careful with "less than." Three less than a number is translated as "x – 3." The reverse of that, "3 – x," would be a number less than 3
To evaluate an algebraic expression means to find the value of the expression when the variable is replaced by a given number. To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.
answer:3-x
