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adell [148]
3 years ago
9

What is x ? And explain how you did it ?

Mathematics
1 answer:
prisoha [69]3 years ago
5 0
Don’t u hate when it’s says explain how u did it?
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If x= 4y + 3 and y = -2x - 3, what is the value of xy?
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<u>Giv</u><u>en</u><u> that</u><u> </u><u>:</u><u>-</u><u> </u>

  • x = 4y +3

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<u>To</u><u> </u><u>Find</u><u> </u><u>:</u><u>-</u><u> </u>

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<u>Solu</u><u>tion</u><u> </u><u>:</u><u>-</u><u> </u>

→ x = 4y + 3 equation 1st

→ y = -2x -3 equation 2nd .

Now putting the value of x from first equation to second equation.

→ y = -2(4y +3 ) -3

→ y = -8y - 6 - 3

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→ 9y = -9

→ y = -1

Now putting the value of y in equation first .

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→ x = -4 + 3

→ x = -1

Now multiply and X and y.

→ x.y = -1(-1)

→ x.y = 1 .

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