Answer:
![x = ((g + 3f)/(a)) - b](https://img.qammunity.org/2021/formulas/mathematics/college/ed76zw2fsaaj0vevfv1cmozk9skwictoql.png)
Explanation:
Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Do the opposite of PEMDAS.
Note that PEMDAS =
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction
& is the order of operation.
First, divide a from both sides:
![a(x + b) = g + 3f](https://img.qammunity.org/2021/formulas/mathematics/college/j6krz98jlxictrtvoy88j85foloqp8aeyi.png)
![(a(x + b))/(a) = (g + 3f)/(a)](https://img.qammunity.org/2021/formulas/mathematics/college/e6vhnl17fu7z4v33nk9loz3o09o40p9i1x.png)
![x + b = (g + 3f)/(a)](https://img.qammunity.org/2021/formulas/mathematics/college/ek567rq0zrvonqvw6a1us85rgk3pyl22mo.png)
Next, subtract b from both sides to isolate the variable, x.
![x + b (-b) = (g + 3f)/(a) (-b)](https://img.qammunity.org/2021/formulas/mathematics/college/cq2vqxlsygjaofur152zkqjci19e6h33rm.png)
![x = ((g + 3f)/(a)) - b](https://img.qammunity.org/2021/formulas/mathematics/college/ed76zw2fsaaj0vevfv1cmozk9skwictoql.png)
![x = ((g + 3f)/(a)) - b](https://img.qammunity.org/2021/formulas/mathematics/college/ed76zw2fsaaj0vevfv1cmozk9skwictoql.png)