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3 years ago

-10x+2y=20

1 answer:

6 0

2x + 3y = -21
2x = -21 - 3y
x = -10.5 - 3/2y

-10x + 2y = 20
-10(-10.5 - 3/2y) + 2y = 20
105 + 15y + 2y = 20
105 + 17y = 20
17y = -85
y = -5

2x + 3y = -21
2x + 3(-5) = -21
2x - 15 = -21
2x = -6
x = -3

Therefore, the coordinates are (-3, -5).

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