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Mathematics 20 Online
JamesTDG:

What is the missing coefficient? (please be sure to show work, as I have modified the problem to not cheat) (15x^2+11x^2+8x)-(7x^2+5y^2+2x) = ___x^2+6y^2+6x

Vocaloid:

It’s only asking for the coefficient of x^2 so you can focus on the x^2 terms only 15x^2 + 11x^2 - 7x^2 = ?

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