Opposite:
Just change the sign.
If it's a positive number, make it negative.
If it's a negative number, make it positive.
Absolute value:
Even easier.
Just throw away the sign, and you have it.
Answer:
x difference is 8
Step-by-step explanation:
Y values are the same so just find the difference in -4 and 4
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Step-by-step explanation:
2x +100=16+4x
-2x. -2x
100=16+2x
-16. -16
84=2x
divide both sides
x=42