This is answer itself.
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Answer:
a+9 = b
Step-by-step explanation:
a=b-9
Add 9 to each side
a+9=b-9+9
a+9 = b
Answer:
He should use the computer less.
Step-by-step explanation:
It is bad for mathews eyes.
Answer:
The student should measure one angle and that angle will be equal to the opposite angle.
Step-by-step explanation:
Opposite angles in a parallelogram are equal.
Opposite sides in a parallelogram are equal.