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Exercise

$9x+3=39$

Step-by-step Solution

1

Factor the polynomial $9x+3$ by it's greatest common factor (GCF): $3$

$3\left(3x+1\right)=39$
2

Divide both sides of the equation by $3$

$3x+1=13$
3

We need to isolate the dependent variable $x$, we can do that by simultaneously subtracting $1$ from both sides of the equation

$3x+1-1=13-1$
4

Canceling terms on both sides

$3x=12$
5

Divide both sides of the equation by $3$

$x=4$

Final answer to the exercise

$x=4$

Try other ways to solve this exercise

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