Estimate the solutions to the system. (The math problem is in the pictures along with the answer choices)

15 / 2 = 7.5

100 / 7.5 = 13.

im super bad at school but u for some reason need to have points to ask questions and you get points by answering so thats all im doing sorry for t r o l l i n g  

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i may be incorrect but i believe that her first error was in step one when she multiplyed her equation by 1/4 when she should have divided it by 1/4