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Solving Equations with Variables on Both Sides

If x=1 ; y=...

Question

If $x = 1; y = 2$ find the values of the following expressions.
$x y + 3 y - 9$

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Solution

$= x y + 3 y - 9$
$= (1) (2) + 3 (2) - 9$
$= - 1$

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x = 1

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Solving Equations with Variables on Both Sides

Standard VIII Mathematics

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