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17-09-2018
Mathematics

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Solve the following equation. 3(x – 7) – x = 2x – 21 1 point

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17-09-2018

[tex]3(x-7)-x=2x-21\ \ \ \ |\text{use distributive property}\\\\(3)(x)+(3)(-7)-x=2x-21\\\\3x-21-x=2x-21\ \ \ \ |+21\\\\3x-x=2x\\\\2x=2x[/tex]

Answer: all real numbers. The equation is identity.

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