Answer:
x = 9.5
Step-by-step explanation:
<u>Step 1: Distribute</u>
x + (2x + 3) + 0.3(2x + 3) = 38.10
<em>x + 2x + 3 + 0.6x + 0.9 = 38.10</em>
<u>Step 2: Combine Like Terms</u>
x + 2x + 3 + 0.6x + 0.9 = 38.10
<em>3.6x + 3.9 = 38.10</em>
<u>Step 3: Subtract 3.9 from both sides</u>
3.6x + 3.9 - 3.9 = 38.10 - 3.9
3.6x / 3.6 = 34.2 / 3.6
<em>x = 9.5</em>
Answer: x = 9.5