A pentagon has a perimeter of 40 cm. What is the perimeter of the pentagon after

The perimeter should still be 40cm

Step-by-step explanation:

The pentagon went through a translation and a rotation, which does not affect the pentagon's side lengths.

The answer is a + 12

Solution:
In order to solve it, you need to separately solve the numbers that have something in common- for ex: if they are just numbers, or if they have the same exact variables

In order to make it easier, you can rearrange the equation
4a - 3a + 19 - 7
4a - 3a = a
19 - 7 = 12

Since these numbers can't be combined due to the fact that they have nothing in common, you leave the equation as is, resulting in the

a + 12