Well, isn't that a happy little question! When you have 5x and then take away 5x, you're left with zero. It's like painting a beautiful sky and then gently blending it all away to create a blank canvas ready for your next masterpiece. Just remember, mistakes are just happy little accidents in the world of math!
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5x-7 is an algebraic expression
5x² - 18x + 9 = (5x² - 15x) - (3x - 9) = 5x(x - 3) - 3(x - 3) = (5x - 3)(x - 3).
X= 2!
If you mean: 5x/7 -6 = x then x = -21
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