Substituting Variables

Front

What is substituting a variable?

Back

Substituting a variable means replacing a variable in an expression or equation with a specific value.

Front

What is the value of x in the equation x + 12 = 17?

Back

x = 5

Front

If x = 3, what is the value of the expression 3x + 1?

Back

10

Front

What does the expression 5h represent when h = 2?

Back

5(2) or 10

Front

What is the result of substituting x = 1 in the expression 5 + x + 2x?

Back

8

Front

What is the value of the expression 6q + m - m when m = 8 and q = 3?

Back

18

Front

How do you solve for a variable in an equation?

Back

Isolate the variable on one side of the equation using inverse operations.

Front

What is an expression?

Back

An expression is a combination of numbers, variables, and operations without an equality sign.

Front

What is an equation?

Back

An equation is a mathematical statement that asserts the equality of two expressions.

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.