myleefaustin
26.02.2020 •
Mathematics
Solve the system of equations.
2x + 2y + 3z = 9
2x+6y + 5z = 7
5x + 2y + 4z = 9
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Ответ:
Step-by-step explanation:
D =![\left[\begin{array}{ccc}2&2&3\\2&6&5\\5&2&4\end{array}\right]](/tpl/images/0525/7342/29cc0.png)
Dx =![\left[\begin{array}{ccc}9&2&3\\7&6&5\\9&2&4\end{array}\right]](/tpl/images/0525/7342/2967a.png)
Dy =![\left[\begin{array}{ccc}2&9&3\\2&7&5\\5&9&4\end{array}\right]](/tpl/images/0525/7342/6b3c5.png)
Dz =![\left[\begin{array}{ccc}2&2&9\\2&6&7\\5&2&9\end{array}\right]](/tpl/images/0525/7342/22e73.png)
x = |Dx|/D = 40/-16 = -5/2
y = |Dy|/D = 68/-16 = -17/4
z = |Dz|/D = -120/-16 = 5/2
Ответ:
OMG
Step-by-step explanation:
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