book Maths Puzzle Numerical Ability

hilary is trying to determine the cost of health care to college students and parents' ability to cover those cost. She assumes that the cost of one year of health for a college s

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Hi Tutors, it's me again I need help with the following problems can you help me. Thank you so much.

y=3x+2

x=5x

y=2x+1 I am having more problems i understand now the last one i submitted but i have TWO problems i cant understand
here is one
During one week Dow Jones Industrial average, the most