Addition & Subtraction Equations

Front

What is the process to isolate a variable in an addition equation?

Back

To isolate a variable in an addition equation, subtract the constant from both sides of the equation.

Front

How do you solve for a variable in a subtraction equation?

Back

To solve for a variable in a subtraction equation, add the constant to both sides of the equation.

Front

What is the solution to the equation n + 8 = 12?

Back

n = 4

Front

If 17 + b = 20, what is the value of b?

Back

b = 3

Front

How can you express x in the equation 87 = 100 - x?

Back

x = 100 - 87, which simplifies to x = 13.

Front

What is the value of c in the equation 65 = 40 + c?

Back

c = 25.

Front

In the equation 120 = b - 80, how do you find b?

Back

Add 80 to both sides: b = 120 + 80, so b = 200.

Front

What is the first step in solving the equation 40 + c = 65?

Back

Subtract 40 from both sides to isolate c.

Front

What does it mean to 'isolate a variable' in an equation?

Back

Isolating a variable means to manipulate the equation so that the variable is on one side by itself.

Front

What is the importance of maintaining balance in an equation when solving for a variable?

Back

Maintaining balance ensures that both sides of the equation remain equal after performing operations.