Which expression shows the amount of tax on a t shirt that cost x dollars, if tax is 7%

2nd option: 0.07

Step-by-step explanation:

100% in decimal form is 1.00. S0, 7 is really 0.07. Hope this helps. Mark brainliest if it does!

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