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Solving Simultaneous Linear Equation Using Cramer's Rule

Solve 5 y +2 ...

Question

Solve $5 y + 2 y + y - 7 y =$ ___

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Solution

$5 y + 2 y + y - 7 y$
$= 8 y - 7 y$
$= y$

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By equating coefficients of variables, solve the following equations.

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x + 2 y + 3 z = 1; 2 x + 5 y + 6 z = 2; 3 x + 7 y + 8 z = 4

using reduction method.

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Complete the following mathematical statement.
5y + 2y + y - 7y =

Complete the following mathematical statement 5y + 2y + y - 7y =

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