Answer:
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Step-by-step explanation:
We are given with two equations
first equation is 
second equation is
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we find the result of subtracting two equation
subtract the second equation from the first, so
first equation - second equation, multiply second equation by -1 and then add it with first equation
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
Now add both equations, we get
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Answer:
the answer is 3.
Step-by-step explanation:
mode if what numberhappens most often
Answer:
12
Step-by-step explanation:
4x-3x
4*3=12
it is 12
Answer: none
Step-by-step explanation: there are no WHOLE numbers between 39
-1/3+2z=-5/6
-2/6+2z=-5/6
Add 2/6 to both sides:
2z=-3/6
2z=-1/2
Divide both sides by 2
z=-1/4
Hope this helps :)