C6 Topic 4 One-Step Equation Review

Front

Solve the equation 48 = 6w. Show ALL work, including a check.

Back

w = 8. To check: 6 * 8 = 48.

Front

5 n = 30. Show how you isolated the variable (what you did to each side), solve and check.

Back

n = 6. Isolate by dividing both sides by 5: n = 30/5.

Front

Solve x – 125 = 375. Show ALL work, including a check.

Back

x = 500. To check: 500 - 125 = 375.

Front

d - 6.2 = 0. Show how you isolated the variable, solve and check.

Back

d = 6.2. Isolate by adding 6.2 to both sides.

Front

Determine whether the value is a solution. Show how you isolated the variable, solve and check. 18 + x = 26 for x = 4

Back

No. Check: 18 + 4 = 22, not 26.

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 isolate a variable?

Back

To isolate a variable means to manipulate an equation so that the variable is on one side and all other terms are on the other.

Front

What is the first step in solving the equation 3x + 5 = 20?

Back

Subtract 5 from both sides to isolate the term with x.

Front

What is the solution to the equation 2x = 10?

Back

x = 5. Divide both sides by 2.

Front

How do you check your solution for an equation?

Back

Substitute the solution back into the original equation to see if both sides are equal.