Substitution

Front

What is substitution in mathematics?

Back

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

Front

Evaluate -3y - 9 when y = -8.

Back

15

Front

If y = 4, what is the value of 3y + 5?

Back

17

Front

Calculate 3a + 5b if a = 4 and b = 6.

Back

42

Front

Find the value of 2x - z when x = 3, y = 6, and z = 7.

Back

-1

Front

Solve for b in the equation 11b + 7 = 40.

Back

b = 3

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 numbers.

Front

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

Back

Identify the variable to be substituted and replace it with the given value.

Front

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

Back

22

Front

What is the result of substituting y = 2 into the expression 5y - 3?

Back

7