47:PLEASE HELP Find the y-intercept of -x +2y=20

The empire state building in new york city is 1454 feet tall a model of a building is 24 inches tall what is the ratio of the height of the model to the height of the actual empire state building

Alicense plate is to consist of 44 digits followed by 55 uppercase letters. determine the number of different license plates possible if the first and second digits must be? odd, and repetition is not permitted.

Solve by any method (graphing, substitution or linear combination)y = x - 82x + 3y = 1a) (2, -6)b) (5, -3)c) (4, -4)d) (0, -8)i figured it out. the answer is (5, -3)