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For simultaneous equations in x and y, i...

For simultaneous equations in `x` and `y`, if `D_(x)=25`, `D_(y)=50` and `D=5`, then what is the value of `x`?

A

`-5`

B

`1/5`

C

10

D

5

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Knowledge Check

  • For simultaneous equations in x and y , if D_(x) = 49 D_(y) = - 63 and D = 7 , then what is the value of x ?

    A
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    B
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    `1/3`
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    2
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    `1/2`

  • For simultaneous equations in x and y , if D = 30 , D_(x) = -18 , D_(y) = -12 , then what is the value of y ?

    A
    `-3/5`
    B
    `3/5`
    C
    `-2/5`
    D
    `2/5`

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