Sorry if it is messy but if you dont understand feel free to ask .
The answer is -485.
To find this we first need to get rid of the 5 in the denominator.
100 =

So we multiply each side by 5.
500 = 15 - x
Now we need to get rid of the 15. So we subtract 15 from both sides.
485 = -x
Then since our x is negative, we need to divide by -1.
-485 = x
$4.00 is my answer.
3x + 5(3) = 27
3x = 27 - 15
3x = 12
x = 12÷3
x = 4
No because a triangle is 180 degrees and the following angles only equal to 165
10. 6.8 this is the nearest tenth
13. 3.7 this is the nearest tenth
16. 6.7 this is the nearest tenth