x−7=7−x

To solve this equation, we can simplify and solve for x.

First, we can simplify both sides of the equation:

x - 7 = 7 - x

Now, let's isolate the x term on one side of the equation:

x + x = 7 + 7

2x = 14

Now, divide both sides of the equation by 2:

2x/2 = 14/2

x = 7

Therefore, the solution to the equation x - 7 = 7 - x is x = 7.

3(x+5)=3x+5

To solve this equation, we can distribute the 3 on the left side of the equation:

3(x + 5) = 3x + 5

Now, let's simplify:

3x + 15 = 3x + 5

Next, we can subtract 3x from both sides of the equation:

3x - 3x + 15 = 3x - 3x + 5

15 = 5

This equation is not possible, as 15 does not equal 5. Therefore, there is no solution to the equation 3(x + 5) = 3x + 5.