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Ivenika [448]
2 years ago
11

Solve the linear system using the method of substitution

Mathematics
1 answer:
nika2105 [10]2 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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Step-by-step explanation:

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a) You have to move the decimal point 11 times until it gets to the right of the 1st nonzero number, which is 7. You then rewrite this number as

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The exponent of 10 is a negative number because you moved the decimal point to the right.

b) Similarly, you have to move the point 9 times to the right so the answer is

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5 0
3 years ago
What is the solution to -84 + 28 =<br><br> With an explanation please,,
myrzilka [38]

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3 years ago
(100)• (-0.09) 7th Grade math
matrenka [14]

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Marta_Voda [28]

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What's the answer?? I don't get it
quester [9]
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