Linear Algebra Examples

$270 = 5.5 (40) + b$

Step 1

Rewrite the equation as $5.5 (40) + b = 270$ .

$5.5 (40) + b = 270$

Step 2

Multiply $5.5$ by $40$ .

$220 + b = 270$

Step 3

Move all terms not containing $b$ to the right side of the equation.

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Step 3.1

Subtract $220$ from both sides of the equation.

$b = 270 - 220$

Step 3.2

Subtract $220$ from $270$ .

$b = 50$

Step 4

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

${b | b = 50}$

Step 5