OneStep Equations and Inverse Operations
Key Questions

They are helpful for solving with respect to a variable: if after some step you find yourself in a situation such as
#\cos(x)=0.7# , if you want to find the value of#x# for which this statement is true, you need to apply the inverse cosine function at both sides and obtain#x=\cos^{1}(0.7)# 
Answer:
Substitute the solution for the variable in the equation and see if both sides of the equation are equal.
Explanation:
For example:
#x+9=12# Subtract
#9# from both sides.#x=129# #x=3# Now check by substituting
#3# for#x# into the equation and solve.#3+9=12# #12=12# Check! 
A onestep equation is an equation that requires only one step to arrive at its solution.
I hope that this was helpful.
Questions
Linear Equations

OneStep Equations and Inverse Operations

Applications of OneStep Equations

TwoStep Equations and Properties of Equality

MultiStep Equations with Like Terms

Distributive Property for MultiStep Equations

Equations with Variables on Both Sides

Equations with Ratios and Proportions

Scale and Indirect Measurement Applications

Conversion of Decimals, Fractions, and Percent

Percent Equations

Percent of Change

Formulas for Problem Solving