Solve One-Step (+/-) Equations

Front

What is a one-step equation?

Back

A one-step equation is an algebraic equation that can be solved in a single step by performing the same operation on both sides to isolate the variable.

Front

How do you isolate a variable in an equation?

Back

To isolate a variable, perform the inverse operation on both sides of the equation.

Front

What is the inverse operation of addition?

Back

The inverse operation of addition is subtraction.

Front

What is the inverse operation of subtraction?

Back

The inverse operation of subtraction is addition.

Front

Solve for x: x - 62 = 123

Back

x = 185 (Add 62 to both sides)

Front

Solve for x: x + 12 = 20

Back

x = 8 (Subtract 12 from both sides)

Front

If Jane (j) is 3 years older than Sam (s), what equation represents this relationship?

Back

s + 3 = j.

Front

If Jane is 12 years old, how old is Sam?

Back

s + 3 = 12, so s = 9.

Front

In 12 years, James will be 49. How old is he now?

Back

James is 37 years old (49 - 12 = 37).

Front

Evaluate: y - 4.6 = 12

Back

y = 16.6 (Add 4.6 to both sides).