Which of these equations has only one solution?


A

2a + 7 = a + 10


B

a + 6 = 6 + a


C

4a + 4 = 4a + 9


D

3x – 3 = 3(x – 1)

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Answer:

The answer is A

Step-by-step explanation:

The equation has only one solution will be 2a + 7 = a + 10. Then the correct option is A.

A connection between a number of variables results in a linear model when a graph is displayed. The variable will have a degree of one.

Let's check all the options, then we have

A. 2a + 7 = a + 10, simplify the equation, then we have

2a + 7 = a + 10

a = 3

B. a + 6 = 6 + a, the equation has infinite solutions.

C. 4a + 4 = 4a + 9, the equation has no solution.

D. 3x – 3 = 3(x – 1), the equation has infinite solutions.

The equation has only one solution will be 2a + 7 = a + 10. Then the correct option is A.

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