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(3x+9) (7x+5)

21x^2 + 78x + 45

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Find the possible values of x when x^2+8x+15=0

You are given two equations: 3y-2x=11 and y+x=12. By solving simultaneously, what is the value of x and the value of y.

Please explain (said question) surrounding a proof of 2 equal angles

y=2x+5, calculate x when y=11

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