Question

how find value through expressions

Answer 1

To find the value through expressions, you need to substitute the variables with their respective values and perform the necessary calculations. Here are some steps to follow:

1. Identify the variables and their values: Determine the values given or known for each variable in the expression.
2. Substitute the values into the expression: Replace each variable with its corresponding value in the expression.
3. Simplify the expression: Perform any required calculations or simplifications according to the order of operations (parentheses, exponents, multiplication, division, addition, and subtraction).
4. Evaluate the simplified expression: Determine the final numerical value of the expression.

For example, let's say you have the expression 2x + 5 and want to find its value when x = 3. Here's how you would find it:

1. Identify the variables and their values: In this case, the variable is x, and its value is given as x = 3.
2. Substitute the value into the expression: Replace x with 3 in the expression, resulting in 2(3) + 5.
3. Simplify the expression: Perform the calculations 2(3) = 6, so the expression becomes 6 + 5.
4. Evaluate the simplified expression: Add 6 + 5 to get the final value of 11.

Therefore, when x = 3, the value of the expression 2x + 5 is 11.