Algebra 1 Tutorial
Solving an equation in one variable
In general, a one-variable equation such as ax+b=c can be solved by “undoing” the order of operations (PEMDAS).
The order of operations is: parenthesis, exponents, multiplication, division, addition, subtraction. By doing the order of operations in reverse, we unravel the equation and isolate the variable.
Solve for x:
Here is the systematic way to solve this equation:
Subtract 4 from both sides.
Divide both sides by 4.
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