Answers created by Evileyebrow

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How do you solve $2 x - y = 6$ $2x-y=6$ and $x + y = - 3$ $x+y=-3$ ?
How do you factor ${(x - 1)}^{2} - 4$ $(x-1)^2 - 4$ ?
How do you solve $5 \sqrt{x + 1} = 21$ $5sqrt(x+1)=21$ ?
Courtney bought 7 melons for $8.99. How much did she pay for each melon?
What percent of 75 is 15?
How do you simplify $\frac{12 \sqrt{3}}{2 \sqrt{3}}$ $(12sqrt(3)) /( 2sqrt(3))$ ?
How do you simplify $\frac{x^{2} + 5 x + 6}{x + 1} \cdot \frac{x^{2} - 1}{x + 3}$ $(x^2+5x+6)/(x+1) * (x^2-1)/(x+3)$ ?