Solve the two-step equation. Analyze the solution shown.
1. β|βx| = 7: given
2. |βx| =...
Mathematics, 05.10.2020 14:01 kaziyahf2006
Solve the two-step equation. Analyze the solution shown.
1. β|βx| = 7: given
2. |βx| = β7: multiplication property of equality
3. βx = 7 or βx = β7: definition of absolute value
4. x = β7 or x = 7: multiplication property of equality
5. Check: β|β(β7)| = 7, β7 β 7
β|β7| = 7, 7 = 7
Negative times negative is positive.
Determine the flaws in the solution.
The multiplication property of equality in Step 2 should result in |x| = 7.
The definition of absolute value is applied incorrectly. There is no solution.
The reason in Step 4 should be the addition property of equality.
The multiplication property of equality in Step 4 should result in only x = 7.
In evaluating the solutions, the absolute value should be simplified first to get a positive value.
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