Linear Algebra Examples

$4 x + 5 x = 94$

Step 1

Add $4 x$ and $5 x$ .

$9 x = 94$

Step 2

Divide each term in $9 x = 94$ by $9$ and simplify.

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Step 2.1

Divide each term in $9 x = 94$ by $9$ .

$\frac{9 x}{9} = \frac{94}{9}$

Step 2.2

Simplify the left side.

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Step 2.2.1

Cancel the common factor of $9$ .

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Step 2.2.1.1

Cancel the common factor.

$\frac{9 x}{9} = \frac{94}{9}$

Step 2.2.1.2

Divide $x$ by $1$ .

$x = \frac{94}{9}$

Step 3

The domain is the set of all valid $x$ values.

${x | x = \frac{94}{9}}$

Step 4