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

If y=7, what is the value of 2(y+4)?

Back

22

Front

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

Back

34

Front

If p=3 and q=5, what is the value of p + q + 2?

Back

10

Front

What is the first step in solving an equation like 11b + 7 = 40?

Back

Isolate the variable term by subtracting 7 from both sides.

Front

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

Back

17

Front

What does it mean to evaluate an expression?

Back

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

Front

How do you solve for a variable in an equation?

Back

You isolate the variable on one side of the equation using inverse operations.

Front

What is the value of 5x + 3 when x = 2?

Back

13

Front

If a = 6, what is the value of 4a - 2?

Back

22