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Bingel [31]
3 years ago
8

2x+7y=-5 5y-7x=12 Solve by elimination

Mathematics
1 answer:
MatroZZZ [7]3 years ago
3 0

Answer:

x = - 109/59

y = - 11/59

Step-by-step explanation:

2x+7y=-5

5y-7x=12

by elimination we get

x = - 109/59

y = - 11/59

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inna [77]

Given

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To find a solution for the linear equation, the first step is to write the equation in slope-intercept form:

-Pass the x-term to the right side of the equation by applying the opposite operation to both sides of the equal sign:

\begin{gathered} -2x+2x-2y=8+2x \\ -2y=2x+8 \end{gathered}

-Divide both sides by -2:

\begin{gathered} \frac{-2y}{-2}=\frac{2x}{-2}+\frac{8}{-2} \\ y=-x-4 \end{gathered}

Once you have expressed the equation of the line in slope-intercept form, replace it with any value for x and calculate the corresponding value of y, for example, x=2

\begin{gathered} y=-(2)-4 \\ y=-2-4 \\ y=-6 \end{gathered}

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As you can see the values are a valid solution for the linear equation.

So the solution is:

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6 0
1 year ago
Which expression can be substituted for y in the top equation of the
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Answer:

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