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Semenov [28]
3 years ago
9

Solve using substitutionx=-6x-y=-8​

Mathematics
1 answer:
aleksklad [387]3 years ago
4 0

Answer:

(-6,2)

Step-by-step explanation:

x =  - 6 \\ x - y =  - 8

<u>Substitution</u>

Substitute x = -6 from the first equation in the second equation.

- 6 - y =  - 8 \\  - 6  + 8 = y \\ 2 = y

Normally, we have to substitute either x-term or y-term in one of the equation to get another term. For this situation, we already know the value of x so It is not necessary to substitute the y-value.

<u>Answer</u><u> </u><u>Check</u>

We have to check the answer to make sure that we have got the right answer.

We can check the answer by substituting both x-value and y-value in the equation.

x - y =  - 8

Substitute x = -6 and y = 2 in the equation.

- 6 -  2 =  - 8 \\  - 8 =  - 8

The equation is true. Therefore, our answer is (-6,2)

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Answer:

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Step-by-step explanation:

The wording "onions cost twice as much as potatoes" is understood to mean the cost per pound of onions (n) is equal to two times the cost per pound of potatoes (2p). Then the appropriate equation would be ...

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Then the solution is ...

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Step-by-step explanation:

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x = (17 - 14)/2

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