5x - 2x = 63 + 57
3x = 120
x = 40
Answer:

Step-by-step explanation:
The open circle means that the point is not included in the solution set, and the arrow pointing left means that all numbers less than -2 are members.
In set-builder notation, each term has a special meaning. The braces enclose the members of the set.
Here's how you translate the notation,

Answer:
A. x2 − 3 x 2 − 18x
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Hope I helped!!!
Please let me know if im right or wrong :)
<em>~Nuha</em>
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