Answer:
6
Step-by-step explanation:
1. re-write the given system:
cx+3y=c-3; => y= -cx/3 +(c-3)/3
12x+cy=c; => y= -12x/c+c/12
2. according the condition the rule for the parallel graphs is:
-c/3= -12/c
3. to calculate the unknown 'c':
c²=36; ⇔c=±6
The solution to the problem is as follows:
<span>C = D - C / M
Cost = Deposit - Cost / Months
5250 = 5250 - 552 / 24
</span>
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