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10 votes
How many solutions does the following equation have?

7(y+3)=5y+8
A. No Solution
B. Exactly One Solution
C. Infinitely many solutions

2 Answers

10 votes
B. Exactly one solution

7y +21 = 5y +8
7y +13=5y
13=-2y
-6.5=y
User GreenTriangle
by
8.2k points
9 votes

Answer:

B. Exactly One Solution

Explanation:

Given:


7(y+3)=5y+8

Expand the brackets:


\implies 7y + 21 = 5y + 8

Subtract 21 from both sides:


\implies 7y + 21-21 = 5y + 8-21


\implies 7y=5y-13

Subtract 5y from both sides:


\implies 7y-5y=5y-13-5y


\implies 2y=-13

Divide both sides by 2:


\implies (2y)/(2)=(-13)/(2)


\implies y=-(13)/(2)

Therefore, the equation has exactly one solution.

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