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4 years ago

18x -16y = -312 78x -16y = 408

Mathematics

1 answer:

vichka [17]4 years ago

8 0

Answer:

(-12,6)

Step-by-step explanation:

using elimination method multiply the second equation by -1

18x - 16y = -312

-78x + 16y = -408

add the two equations

60x = -720

divide by 60

x = -12

plug -12 into the first equation

18(-12) - 16y = -312

-216 - 16y = -312

-16y = -96

y = 6

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