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Ivenika [448]
3 years ago
11

Solve the linear system using the method of substitution

Mathematics
1 answer:
nika2105 [10]3 years ago
3 0

Answer:

y = -1

x = 9

(9, -1)

Step-by-step explanation:

1) Since "x" equals <em>-4y+5, </em>substitute that into the bottom equation for x: -4y+5+2y=7

2) Combine like terms: -2y+5=7

3) Subtract 5 from both sides: -2y=-2

4) Divide both sides by -2: y=-1

Now you have figured out that <em>y= -1 </em>

1) Substitute <em>-1 </em>for <em>y </em>in the top equation: x=-4(-1)+5

2) Solve: x=4+5

3) x=9

Now you have figured out that <em>x=9 </em>

<em />

The final answer is (9, -1)

Hope this helps! :)

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a logical approach would be to try -1, -1, and 1 since -1 * -1 = 1 and then 1* 1 =1

we can make a= -1 , b= -1, and c= 1
 (we need b to equal -1 so that we get an answer of -1 opposed to if we made a=-1 and c=-1, all outcomes would equal 1)
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since 1 is the largest possible outcome and -1 is the lowest possible outcome you should subtract the two

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Step-by-step explanation:

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