Answer: <em>x=9</em>
Step-by-step explanation:
<em>First we need to realize that a triangle and all 3 of its angles must equal to 180°</em>
<em>Let's take 67°+74=141°</em>
<em>Now we will take 180°-141°=39</em>
<em>Now we know the missing angle is 39°, but we are still unsure of what x is</em>
<em>So let us plug in 9</em>
<em>4(</em><em>9</em><em>)+3</em>
<em>36+3</em>
<em>39</em>
<em>x=9</em>
