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denis-greek [22]
3 years ago
14

Solve the equation -4x + 7 y equals 20. Y=3x+15

Mathematics
1 answer:
satela [25.4K]3 years ago
3 0

Substitue what y equals for y and solve.

-4x+7(3x+15)=20 \\-4x+27x+105=20 \\23x=-85 \\x=-\boxed{\frac{85}{23}}

Hope this helps.

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Solve each equation, and then choose the correct answer.
kvasek [131]

Answer:

1:  -7x +4x -11=22       Answer: <em>     </em>x=−11

2: 3x - 5 = 7                     Answer:         x=4

3:  3(x + 7) = 5x -7           Answer:        x=14

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Above is the answers.

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<em><u>Hope this helps.</u></em>

4 0
3 years ago
Joey decides to empty his piggy bank and count his money. His bank is filled with only nickels and dimes. Joey counted a total o
xxTIMURxx [149]

Answer:

Joey has 18 nickles and 27 dimes in his piggy bank.

Step-by-step explanation:

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d represent the number of dimes, d>=0

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d = 27 dimes

5 0
3 years ago
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