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3 years ago

Ight someone plz help a girl out asap

Mathematics

1 answer:

marysya [2.9K]3 years ago

4 0

1) 6/11
2) 5/27
3) 42/11 or 3 9/11
4) 50/121

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-2x+4y= 12 3x+7y= 18 last one greatly appreciated

LenaWriter [7]

Value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Step-by-step explanation:

We need to solve the system of equations given.

$-2x+4y=12\\3x+7y= 18$

Solving

Let:

$-2x+4y=12\,\,eq(1)\\3x+7y=18\,\,eq(2)$

Multiply eq(1) by 3 and eq(2) by 2 and add both

$-6x+12y=36\\6x+14y=36\\-------\\26y=72\\y=\frac{72}{26}\\y=\frac{36}{13}$

Putting value of y in equation 1

$-2x+4y=12\\-2x+4(\frac{36}{13})=12\\-2x+\frac{144}{13}=12\\-2x=12-\frac{144}{13}\\-2x=\frac{12*13-144}{13}\\-2x=\frac{12}{13}\\x=\frac{-6}{13}\\$

So, value of x is $\frac{-6}{13}\\$ and y is $\frac{36}{13}$

Solution set is ( $\frac{-6}{13}\\$ , $\frac{36}{13}$ )

Keywords: System of equations

Learn more about system of equations at:

#learnwithBrainly

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4 years ago

What’s the value of x in 46+(7x+9)

Blizzard [7]

This is not a full equation. However, if it were set equal to 0, the answer would be roughly -7.86.

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3 years ago

Need help ASAP!!!!! 14 points to answer with the correct explanation.

Savatey [412]

Step-by-step explanation:

A is the area of the triangle

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3 years ago

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3 years ago

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Step-by-step explanation:

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4 years ago