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joja [24]
3 years ago
14

7x - y = 10 x - 4y = -14

Mathematics
1 answer:
Morgarella [4.7K]3 years ago
8 0

Answer:

(2,4)

Step-by-step explanation:

using substitution you can rewrite 7x-y=10 to y=-10+7x

then use that to substitute for the y in the equation x-4y=-14; which gives you the equation; x-4(-10+7x)=-14

which you can then distribute using foil, giving you x=2.

then you can replace any equation's x with 2 to find y,

for example,

7(2)-y=10

then y=4

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Answer:

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Step-by-step explanation:

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A piggy bank contains 36 coins that consists of dimes and quarters totaling $5.85 how many quarters are in the piggy bank in you
Lesechka [4]
The main idea here is to "translate" the words into maths. 
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We need to know the number if dimes and the number of quarters. So lets say
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Now lets write equations from the written problem. 
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