Solve for Z
Z=78
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Z-38=|-40|
Subtract 15 from -23 to get -38.
Z-38=40
The absolute value of a real number a is a when a\geq 0, or -a when a<0. The absolute value of -40 is 40.
Z=40+38
Add 38 to both sides.
Z=78
Add 40 and 38 to get 78.
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