Hello there!
<u><em>36x+3 is the correct answer.</em></u>
<u><em>Order of operations stands for: p-parenthesis, e-exponents, m-multiply, d-divide, a-add, and s-subtracting. </em></u>
<em>First you had to divide by the numbers.</em>
And it gave us ⇒ 
![=4x[15-6]+3](https://tex.z-dn.net/?f=%3D4x%5B15-6%5D%2B3)

<em>You had to subtract by parenthesis first.</em>
And it gave us ⇒ 

<em>Then multiply by the numbers.</em>
And it gave us ⇒ 

And it gave us the final answer is<u><em> </em></u><u><em>36x+3 is the final answer. </em></u>
Hope this helps! And thank you for posting your question at here on brainly, and have a great day. -Charlie