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Find the nonpermissible replacement for the variable in this expression. Find the nonpermissible replacement for the variable in this expression. five x divided by six x plus three?
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∙ 13y ago
Non-permissable replacements for a variable are any number that would result in the denominator of a fraction equaling zero. In this case, you have 5x / 6x + 3. If only the denominator matters, then you simply need to find out how to make 6x + 3 equal zero. Start with that as your goal. 6x + 3 = 0. Use algebra to isolate the variable. Subtract 3 from both sides and you get 6x + 3 - 3 = 0 - 3. Simpify to get 6x = -3. Divide both sides by 6 to get 6x / 6 = -3/6. Simplify to get x = -1/2 (or -0.5). If you try to use this to replace the variable, you'll get: 6 * -0.5 + 3, simplified to -3 + 3 = 0, Making the denominator zero and the replacement non-permissable.
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