Substitution

Front

What is substitution in algebra?

Back

Substitution in algebra is the process of replacing a variable with a number or another expression to simplify or solve an equation.

Front

How do you evaluate an expression with a given variable value?

Back

To evaluate an expression with a given variable value, substitute the value of the variable into the expression and perform the arithmetic operations.

Front

What is the value of 3y + 5 when y = 4?

Back

17

Front

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

Back

42

Front

How do you solve for an expression involving multiple variables?

Back

To solve for an expression involving multiple variables, substitute the known values of the variables into the expression and simplify.

Front

What is the result of 5m - 2n when m = 3 and n = 7?

Back

1

Front

How do you find the value of an expression with three variables?

Back

Substitute the known values of the three variables into the expression and simplify to find the value.

Front

What is the value of 2c - a - b when a = 4, b = 5, and c = 6?

Back

3

Front

How do you evaluate an expression like 7x - 1 when x = 5?

Back

Substitute 5 for x in the expression 7x - 1, resulting in 7(5) - 1 = 34.

Front

What is the importance of substitution in solving equations?

Back

Substitution is important in solving equations as it allows for the simplification of expressions and helps in finding the values of unknown variables.