Answer: 
Step-by-step explanation:
The period is
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63/9-(10-2) you just have to follow the sentence and quantity just means the total of it. <span />
Answer:

Step-by-step explanation:

Let's multiply the first equation by 7 and the second equation by -2


Now add them together. In this step, x is eliminated.

Divide by 26.

Now plug this into any of the two equations to find x.

Do 15 divided by 24, that should get you the anwser.