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EmmaH

Solve the system x + y = 6 and x - y = 2. What is the value of x? 6 2 4 0

  • one year ago
  • one year ago

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  1. EmmaH
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    how?

    • one year ago
  2. shaik0124
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    4

    • one year ago
  3. shaik0124
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    bcoz from 2nd eqtn y=x-2 now|dw:1358879169169:dw|

    • one year ago
  4. mathstudent55
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    Write the equations, one above the other: x + y = 6 x - y = 2 Notice that you have +y in the first equation and -y in the second equation. That means that if you add the two equations, the +y and the -y will add up to zero and will be eliminated leaving only x in the equation. Let's add the two equations: x + y = 6 x - y = 2 --------------- (add equations) 2x = 8 Divide both sides by 2 x = 4 That's all the problem is asking for. Most of the time you need to find y also. Now that we know x = 4, we substitute that value of x in for x in the first original equation: x + y = 6 4 + y = 6 Subtract 4 from both sides: y = 2

    • one year ago
  5. EmmaH
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    thank you

    • one year ago
  6. shaik0124
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    @mathstudent55 u have lot of patience to write thats nice of u anad keep it up

    • one year ago
  7. mathstudent55
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    You're welcome @EmmaH Thanks @shaik0124 for your nice words.

    • one year ago
  8. shaik0124
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    i hope i too get such patience @mathstudent55 tremendous work with each n every point cleared ,great:)

    • one year ago
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