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Linear Equation in One Variable

Verify by sub...

Question

Verify by substitution that the root of $3 + 2 x = 9$ is $x = 3$ .

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Solution

$3 + 2 x = 9$

Given $x = 3$

$L H S =$ $3 + 2 (3) = 9$

$R H S$ $= 9$

$L H S = R H S$

$∴ x = 3$ is root

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