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6 December, 15:27

Which statement is true?

The equation - 3|2x + 1.2| = - 1 has no solution.

The equation 3.5|6x - 2| = 3.5 has one solution.

The equation 5|-3.1x + 6.9| = - 3.5 has two solutions.

The equation - 0.3|3 + 8x| = 0.9 has no solution.

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  1. 6 December, 15:32
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    You might want to actually try solving each equation to determine whether or not there is a solution.

    -3|2x + 1.2| = - 1 can be re-written/simplified as 3|2x + 1.2| = 1,

    or |2x + 1.2| = 1/3. This has two solutions. (What are they?)

    Go on: try in the same manner to solve each of the remaining three equations.
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