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Alenkinab [10]
3 years ago
7

What is the value of y in the following system? y=3x-5 6x+3y=15

Mathematics
2 answers:
charle [14.2K]3 years ago
8 0

Step-by-step explanation:

y=3x-5

6x+3y=15

6x+3(3x-5)=15

6x+9x-15=15

15x-15=15

+15 +15

15x=30

/15. /15

x=2

6(2)+3y=15

12+3y=15

-12. -12

3y=3

/3 /3

y=1

(2,1)

The answer is (2,1)

8090 [49]3 years ago
6 0

Step-by-step explanation:

6x + 3(3x - 5) = 15

6x + 9x - 15 = 15

15x - 15 = 15

+15 +15

15x = 30

/15 /15

x = 2

6(2) + 3y = 15

12 + 3y = 15

-12 -12

3y = 3

/3 /3

y = 1

(2, 1)

This should be right if it is please make me brainliest.

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Step-by-step explanation:

Let x be the volume of 40% solution and y = volume of the 5% solution.

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From the first equation x = 10 -y so we have:

0.40(10 - y) + 0.05y = 0.20( 10 - y + y)

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Step-by-step explanation:

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