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1 February, 16:51

Solve the following equation

2x-y=17

X-y=10

+1
Answers (2)
  1. 1 February, 17:10
    0
    You can isolate y on both sides, getting:

    2x-17=y and x-10=y

    Then, make the two y equal each other, and solve the equation

    2x-17=x-10

    The answer would be x=7.

    then, plut in the amount into one of the equations:

    x-y=10

    7-y=10

    y=-3

    T

    Therefore, the answer is x=7 and y = - 3, or (7,-3)
  2. 1 February, 17:15
    0
    This is a system of equations.

    1.) Isolate a variable in the equation of your choosing

    Ex. x = y + 10

    2.) Plug in the new equation to the first original one

    Ex. 2 (y + 10) - y = 17

    3.) Solve for the variable in the equation

    Step one for this: Distribute

    Ex. 2y + 20 - y = 17

    Step two for this: Combine like terms

    Ex. y + 20 = 17

    Step three for this: Isolate the variable

    Ex. y = - 3

    4.) Plug in your answer for one variable into one of the original equations

    Ex. X - (-3) = 10

    5.) Solve for x

    x + 3 = 10

    x = 7

    The answer is: x = 7, y = - 3
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