Solve the equation. (See Examples 1–6.)
Example 1
Solve the equation 5x − 3 = 12.
Solution Using the first property of equality, add 3 to both sides. This isolates the term containing the variable on one side of the equation:
Now arrange for the coefficient of x to be 1 by using the second property of equality:
The solution of the original equation, 5x − 3 = 12, is 3. Check the solution by substituting 3 for x in the original equation.
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