substitution

Front

What is substitution in mathematics?

Back

Substitution is a method of replacing a variable with a number or another expression to simplify or solve an equation.

Front

If a=4, b=5, and c=6, what is 2c-a-b?

Back

3

Front

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

Back

17

Front

When x = 3, y = 6, and z = 7, what is 2x - z?

Back

-1

Front

If a = 4 and b = 6, what is 3a + 5b?

Back

42

Front

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

Back

22

Front

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

Back

Identify the value of the variable to be substituted.

Front

How do you evaluate an expression with multiple variables?

Back

Substitute the known values of the variables into the expression and simplify.

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=2 into the expression 3x + 4?

Back

10