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Feliz [49]
3 years ago
7

Solve the system of equations and choose the correct ordered pair. 3y=4x+7 and 5y=4x+25​

Mathematics
2 answers:
Luba_88 [7]3 years ago
7 0

Answer:

(5,9)

Step-by-step explanation:

3y=4x+7

5y=4x+25​

Subtract the two equations to eliminate x

5y=4x+25

-( ​3y=4x+7)

------------------

2y = 0x +18

Divide by 2

2y/2 = 18/2

y =9

Now find x

3y = 4x+7

3*9 = 4x+7

27 = 4x+7

Subtract 7

20 = 4x

Divide 4

20/4 = 4x/4

5 =x

(5,9)

givi [52]3 years ago
5 0

Step-by-step explanation:

3y=4x+7_equation 1

5y=4x+25_equation 2

multiply equation 1 by 5 an equation 2 by 3

15y=20x+35_equation 3

15y=12x+75_equation 4

subtract equations 4 from equation 3

0=8x-40

40=8x

divide both sides by 8

x=5

substitute x into equation 1

3y=4(5)+7

3y=20+7

3y=27

divide both sides by 3

y=9

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I have a pile of 20 coins that includes dimes and quarters. The coins total is $2.75. How many quarters do I have?
Ilia_Sergeevich [38]
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5 0
3 years ago
Solve the system of equations<br> −4x+3y=−2 <br> y=x−1 ​ <br><br> x = <br> y =
dolphi86 [110]
Answer: x = -1 and y = -2

Step-by-step explanation:

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Answer:

<u>20/48 = 42%</u>

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<u>Number of beige tiles</u>

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3 0
2 years ago
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