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Solving Multi-Step Equations

a
Here we begin by multiplying both sides by in order get an equivalent equation without fractions. Now, we could either distribute to the terms in the parentheses or divide both sides with Since is divisible by we'll choose the latter.
b
To solve the equation we need to perform two inverse operations. First, we'll subtract from both sides and then multiply by Note that since is in the denominator, a solution that makes the denominator equal to is not valid.
The solution to the equation is It is a valid solution since and doesn't make the denominator equal to