talscriv talscriv

26-11-2020
Mathematics

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-3x+2y=-39 and 5x+4y=21 Algebra elimination

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meowmeow223334 meowmeow223334

26-11-2020

Multiply the first equation by 2
-6x + 4y = -78
5x + 4y = 21
Subtract those two equations
-11x = -99
X = 9
Plug in 9 for x in one of the equation
-3(9) + 2y = -39
-27 + 2y = -39
2y = -12
Y = -6
In conclusion, x = 9, y = -6

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maeganrmcdaniel maeganrmcdaniel

26-11-2020

X = 9 Y = -6

Hope this helps!!✌

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