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krok68 [10]
3 years ago
11

Solve the system: 4x – 3y = -21 X=-y-14

Mathematics
2 answers:
Reika [66]3 years ago
7 0

Answer:X=−4x/3−21

                 y=4x/3+7

Step-by-step explanation:

Liula [17]3 years ago
4 0

Answer:

The solution for the system of equations is

x=2,y=−2

Explanation:

4x−3y=14.....equation (1)

y=−3x+4.....equation (2)

Solving by substitution

Substituting equation 2 in equation 1

4x−3⋅(−3x+4)=14

4x+9x−12=14

13x=14+12

13x=26

x=2

Finding y by substituting x in equation 1

4x−3y=14

4⋅2−3y=14

8−3y=14

8−14=3y

3y=−6

y=−2

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Umnica [9.8K]

Eric took 20 hours to do the job alone.

<u>Step-by-step explanation</u>:

<u>Given </u>:

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  • Joe took 5 hours to complete the total work.

The amount of work Joe alone can do per hour = 75/5 = 15 packages.

The amount of work Joe and Eric together do per hour = 75/4 = 18.75

The amount of work Eric alone can do per hour = 18.75 - 15 = 3.75

The time Eric took to complete the entire work = 75 / 3.75 = 20 hours.

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Nathan usually drinks 38 ounces of water per day. He read that he should drink 60 ounces of water per day. If he starts drinking
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Answer:

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Hope this helps :)

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3 years ago
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garik1379 [7]

Answer:

(-2, -3)

Step-by-step explanation:

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minus 2x from both sides

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then plug in -2 for x

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8

Step-by-step explanation:

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