Answer:
The awnser is 19 Kilometers
70-20=x
Step-by-step explanation:
210=3*20+3*necklace
3*necklace=210-3*20
necklace=70-20
Solution in the attachment.
x = 3, y = -2, z = -4
6
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 answer is -4
