3 years ago

Solve for x 4 + 2.1x = 22.9

Mathematics

1 answer:

mamaluj [8]3 years ago

5 0

The answer is x=9.
Hope this helps!

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For this case we have the following system of equations:

$8x-9y = -122\\-8x-6y = -28$

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We find the value of "x":

$8x = -122 + 9y\\x = \frac {-122 + 9y} {8}\\x = \frac {-122 + 9 (10)} {8}\\x = \frac {-122 + 90} {8}\\x = \frac {-32} {8}\\x = -4$

The solution is (-4,10)

ANswer:

Option C

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