有限数学 示例

Solve Using a Matrix by Row Operations -21x-2y+z=-72 , 12x+y=44 , -24x-2y+z=-84
, ,
解题步骤 1
Write the system as a matrix.
解题步骤 2
求行简化阶梯形矩阵。
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解题步骤 2.1
Multiply each element of by to make the entry at a .
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解题步骤 2.1.1
Multiply each element of by to make the entry at a .
解题步骤 2.1.2
化简
解题步骤 2.2
Perform the row operation to make the entry at a .
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解题步骤 2.2.1
Perform the row operation to make the entry at a .
解题步骤 2.2.2
化简
解题步骤 2.3
Perform the row operation to make the entry at a .
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解题步骤 2.3.1
Perform the row operation to make the entry at a .
解题步骤 2.3.2
化简
解题步骤 2.4
Multiply each element of by to make the entry at a .
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解题步骤 2.4.1
Multiply each element of by to make the entry at a .
解题步骤 2.4.2
化简
解题步骤 2.5
Perform the row operation to make the entry at a .
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解题步骤 2.5.1
Perform the row operation to make the entry at a .
解题步骤 2.5.2
化简
解题步骤 2.6
Perform the row operation to make the entry at a .
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解题步骤 2.6.1
Perform the row operation to make the entry at a .
解题步骤 2.6.2
化简
解题步骤 2.7
Perform the row operation to make the entry at a .
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解题步骤 2.7.1
Perform the row operation to make the entry at a .
解题步骤 2.7.2
化简
解题步骤 2.8
Perform the row operation to make the entry at a .
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解题步骤 2.8.1
Perform the row operation to make the entry at a .
解题步骤 2.8.2
化简
解题步骤 3
Use the result matrix to declare the final solution to the system of equations.
解题步骤 4
The solution is the set of ordered pairs that make the system true.