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Geynen · Answer 1 · 2019-10-12T15:41:38+0000

Answer: put 3 in the blank

Step-by-step explanation:

$3x-7=3x+12\,\,\,|-3x\\-7 = 12$

The last row shows that this equation will never be true no matter what value of x. This shows that setting the coefficient of x to 3 makes the equation have no solutions.

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