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13.32 An expert witness in a case of alleged racial discrimination in a state university school of nursing

introduced a regression of the determinants of Salary of each professo

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need help could u explain each step thanks

2x-y=6
x=13-2y equations by substitution

thank you so much homework can you please solve this by the substitution method?

y - 2x = -7.5
3x - 5y = 3.2

Thank you for your assistance.