Question

Help me with these three quesions for brainiest:)

Answer 1

Answer:

See below.

Step-by-step explanation:

1) Two equations are equivalent if they have the same solutions.

2) As long as two expressions $a$ and $b$ are equal, so $a=b$, adding the same value for both sides still makes the equation true, so

$a = b$

$a + c = b + c$ is true.

3) As long as two expressions $a$ and $b$ are equal, so $a=b$, subtracting the same value for both sides still makes the equation true, so

$a = b$

$a - c = b - c$ is true.

Answer 2

Answer: f

Step-by-step explanation: