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deff fn [24]
3 years ago
9

Multiply each equation by a constant that would help to eliminate the y terms.

Mathematics
1 answer:
ser-zykov [4K]3 years ago
6 0

Answer:

multiply first equation with 3 and second equation with 5

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an = a1 +d(n-1)

a4 =a1+d(4-1)

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add 1 to each side

-3 = 3d

d= -1

an = a1 +d(n-1)

an = -1 +-1 (n-1)

an = -1 -n +1

an = -n


Choice D


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