3x + 7 = x - 15
First, make sure to subtract

from both sides.
Second, simplify 3x - x to get 2x, and then keep the 7.
Third, subtract

from both sides.
Fourth, simplify -15 - 7 to get -22.
Fifth, take the 2 and divide both sides by it, keeping the

by itself.
Sixth, since 11 goes into 2 to get 22, simplify the fraction to 11.

Answer:
x = -11
Answer:
Explanation:
Find the subject. Who is doing something? Ricky. Ricky what? Ricky was. That is a complete sentence and it makes sense. Ricky going does not make sense. So, Ricky was. What does very unsteady describe? It describes how Ricky was. It describes the verb, making "very steady" an adverbial phrase. A prepositional phrase describes a noun. Nothing in this sentence describes Ricky. "Going" is a helping verb. Ricky was going. "Down the staircase backward," describes how Ricky was going, making it another adverbial phrase.
You didn't say what kind of phrase. I hope I helped.