Linear Algebra Examples

Write as a Vector Equality 2x-8y=4 , x-4y=2
,
Step 1
Write the system of equations in matrix form.
Step 2
Row reduce to eliminate one of the variables.
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Step 2.1
Multiply each element of by to make the entry at a .
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Step 2.1.1
Multiply each element of by to make the entry at a .
Step 2.1.2
Simplify .
Step 2.2
Perform the row operation to make the entry at a .
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Step 2.2.1
Perform the row operation to make the entry at a .
Step 2.2.2
Simplify .
Step 3
Use the result matrix to declare the final solutions to the system of equations.
Step 4
Solve the equation for .
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Step 4.1
Subtract from both sides of the equation.
Step 4.2
Divide each term in by and simplify.
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Step 4.2.1
Divide each term in by .
Step 4.2.2
Simplify the left side.
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Step 4.2.2.1
Cancel the common factor of .
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Step 4.2.2.1.1
Cancel the common factor.
Step 4.2.2.1.2
Divide by .
Step 4.2.3
Simplify the right side.
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Step 4.2.3.1
Simplify each term.
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Step 4.2.3.1.1
Cancel the common factor of and .
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Step 4.2.3.1.1.1
Factor out of .
Step 4.2.3.1.1.2
Cancel the common factors.
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Step 4.2.3.1.1.2.1
Factor out of .
Step 4.2.3.1.1.2.2
Cancel the common factor.
Step 4.2.3.1.1.2.3
Rewrite the expression.
Step 4.2.3.1.2
Move the negative in front of the fraction.
Step 4.2.3.1.3
Dividing two negative values results in a positive value.
Step 5
The solution is the set of ordered pairs that makes the system true.
Step 6
Decompose a solution vector by re-arranging each equation represented in the row-reduced form of the augmented matrix by solving for the dependent variable in each row yields the vector equality.