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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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A= 5

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A= 5 +5+5+5= 20

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4. In one semester, Doug and Laura spent a combined 230 hours in the tutoring lab. If Doug
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Answer:

80 hours

Step-by-step explanation:

let d represent doug, let l represent laura

first, set up a system of equations representing the problem:

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What is the solution of 56= k-42
Aleksandr [31]

Answer:

k=98

Step-by-step explanation:

<u>Let's solve your equation step-by-step.</u>

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<u>Step 1: Flip the equation.</u>

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<u>Step 2: Add 42 to both sides.</u>

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I Hope This Helps If Not Then Im Srry....

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