Substitution in Algebra

Front

What is substitution in algebra?

Back

Substitution in algebra is the process of replacing a variable with a number or another expression to evaluate an algebraic expression.

Front

If x = 5, what is the value of 7x - 1?

Back

34

Front

If a = 6 and b = 7, what is the value of 15 - a - b?

Back

2

Front

When n = 8, what is the value of 10 + 3n?

Back

34

Front

If x = 4, what is the value of 2x + 5?

Back

13

Front

What is the first step in solving an equation using substitution?

Back

Identify the value of the variable to be substituted.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their respective values.

Front

What is the result of substituting x = 3 in the expression 4x + 2?

Back

14

Front

How do you check your answer after substitution?

Back

You can check your answer by substituting the value back into the original equation to see if both sides are equal.

Front

What is the value of 5y when y = 2?

Back

10