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How do you get an answer to the equation, |3-X|=20 when solving for X
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set it up like this -20<3-x<20 and you should be able to figure it out
you can break it into 2 equations: 3 - x = 20 3 - x = -20
an absolute value doesnt care about the sign of the insides; so it can either be equal to 20, or -20. 3-x = 20 or 3-x = -20
You have to remember the rule for absolute values: \[|a| = b \implies a = b \text{ or } a = -b\] Then you can split it up into two equations as ninja said and solve each. The union of the two solutions will be all the solutions.
another option is to take the negative of the innards; which may seem wierd. (3-x) = 20 or -(3-x) = 20
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