Answer:
the answer should be x= -7 hope this helps!
45/X + 63/X= 108/X = Y, X= 108 divided by 2 = y, y=54
You know when it is a periodic function if the values repeats in regular intervals or periods. An example of this is trigonometric functions that repeat over intervals of 2 pi radians.
X is pretzels and y is hot dogs
3x + 2y=195
x +15 =y
3x + 2(x+15)=195
5x=165
x=33
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