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Kryger [21]
3 years ago
12

I need to find x and y

Mathematics
1 answer:
MrRa [10]3 years ago
5 0

Answer:

x =  - 2 \\ y =  - 4

Step-by-step explanation:

- 2x + 2y =  - 4  \:  \:  \:  \:  \:  \\ i.e. \:  \:  \:  - x + y =  - 2 \:  \:  \:  \:  \:  \:  \: ...(1)\\ \\  3x + 3y =  - 18   \\ i.e. \:  \:  \:  \:  \:  \: x + y =  - 6\:  \:  \:  \:  \:  \:  \: ...(2)

From (1) we get

x = 2 + y

Now put x = 2 + y in equation (2)

2 + y + y =  - 6 \\ 2 + 2y =  - 6 \\ 2y =  - 6 - 2 \\ 2y =  - 8 \\  \\ y =  -  \frac{8}{2}  \\  \\ y =  - 4

now put y = -4 in equation (1) we get

- x + ( - 4) =  - 2 \\  - x - 4 =  - 2 \\ x  + 4 = 2 \\ x = 2 - 4 \\ x =  - 2

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