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MakcuM [25]
3 years ago
9

Use the substitution method to solve the system of equations. 2x - y = 10 3x - 2y = 8

Mathematics
2 answers:
larisa [96]3 years ago
7 0

Answer:

x=12, y=14

Step-by-step explanation:

2x - y = 10

Solve the equation for y. Subtract 2x from both sides

- y = -2x+10

Divide both sides by -1

y=2x-10

Substitute 2x-10 for y in the second equation

3x - 2(2x-10)= 8

3x - 4x+20= 8

-1x+20= 8

Subtract 20 from both sides

-1x= -12

Divide both sides by -1

x= 12

y=2x-10

Substitute 12 for x

y=2(12)-10=14

y=14

Lady bird [3.3K]3 years ago
5 0
2x-y=10
3x-2y=8

-y= -2x +10 multiply by(-1)
y=2x-10

3x-2(2x-10)=8
3x-4x+20=8
-x=-12 multply by (-1)
x=12
24-y =10
-y=-14
(12,14)

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Hello there! Thank you for asking your question here at Brainly! I will be assisting you with answering this question, and will be teaching you how to handle it on your own in the future.

We have 350 total keychains, in which 10% are yellow, 3/5 are green, and x are red. We will be solving for red, but we need to subtract 10% and 3/5 from 350.

So, let's find out how much 10% of 350 is.
Since 10% is equivalent to 1/10, we can divide 350 by 10 to find how many yellow key chains there are.
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There are 35 yellow key chains. We can subtract this from 350 to narrow it down.
350 - 35 = 315.

Now, let's find how much 3/5 of 350 is, and subtract it from our new number (315).

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315 - 210 = 105.

There are 105 red key chains.

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Answer:

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Step-by-step explanation:

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