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soldier1979 [14.2K]
3 years ago
10

Solve by elimination:4x+7y =8-8x -14y= 5

Mathematics
2 answers:
Anna [14]3 years ago
6 0
\left \{ {\big{4x+7y =8} \atop\big {-8x -14y= 5}} \right.    \\\\  \left \{ {\big{4x+7y =8\ /\cdot2} \atop\big {-8x -14y= 5\ \ }} \right.    \\\\ \left \{ {\big{8x+14y =16} \atop\big {-8x -14y= 5 }} \right.    \\----------\\0=21\\no\ solution
photoshop1234 [79]3 years ago
3 0
\begin{cases}4x+7y =8 \ \ /\cdot 2 \\ -8x -14y= 5 \end{cases}\\ \\\begin{cases}8x+14y =16 \ \ \\ -8x -14y= 5 \end{cases}\\ + \---------\\0 \neq 21 \\ \\ Answer : \ the \ system \ has \ no \ solution


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