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seropon [69]
3 years ago
13

− 10x− 6y= 12 4x+ 7y=− 14

Mathematics
1 answer:
Anestetic [448]3 years ago
5 0

Answer:

x = 0, y = -2

Step-by-step explanation:

\left \{ {{-10x-6y=12} \atop {4x+7y=-14}} \right. = \left \{ {{-10x=12+6y} \atop {4x+7y=-14}} \right. = \left \{ {{x=\frac{12+6y}{-10} }(1) \atop {4x+7y=-14}} \right

Replace x from formula (1) to formula (2), we got:

4*\frac{12+6x}{-10}=-14  \frac{-2}{5}(12+6y)+7y=-14  \frac{-24}{5} + \frac{-12}{5}y+7y=-14  \frac{23}{5}y = \frac{-46}{5}  y = -2\\=> x= \frac{12+6*(-2)}{-10} = 0

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