Step-by-step explanation:
<u>Step 1: Multiply both sides by 2</u>



<u>Step 2: Determine what numbers would be a valid solution</u>
Any number that is greater than 18, not including 18 would pose a valid solution to the expression that was provided.
Answer:
7x²+6x-6
Step-by-step explanation:
1 Combine similar terms
x²+5x+6x²+x-6
7x²+5x+x-6
2 Combine similar terms
7x²+5x+x-6
7x²+6x-6