To solve for the value of x, you can simply add all of the values and expressions together and make it equal to 180 degrees, since the sum of all angles in a triangle add up to this amount.
Then we can solve for X, by algebra.
In simplified form, the answer would be -16x+51
if he uses 1/4 cup of batter he will only have 11 cupcakes when he is done. I have to disagree because he will be missing it by 1 cupcake.
