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1 year ago

Please help me !! Giving brainliest!!

Mathematics

2 answers:

Neporo4naja [7]1 year ago

3 0

Answer:

O 4th option : (-4, -2)

Step-by-step explanation:

⇒ 9x - 9y = -18

⇒ -6x + 9y = 6

3x = -12
x = -4

9(-4) - 9y = -18
-36 - 9y = -18
-9y = 18
y = -2

⇒ (x , y)

⇒ (-4, -2)

Alex_Xolod [135]1 year ago

3 0

Answer:

(-4, -2)

Step-by-step explanation:

When using the elimination method, we combine the equations to get one. To combine them, we have to find a term with a number that is either positive or negative to the other, example : -6y and 6y, or 4x and -4x. We then take them and combine both equations to get one. Becuase they are the same, they simply cancel each other out.

9x - 9y = -18

-6x + 9y = 6

3x = -12

Divide both sides by 3 to get x alone

x = -4

Now, to find the y value, we can now plug in what we found for x.

9(-4) - 9y = -18

-36 - 9y = -18

Add 36

-9y = 18

Divide by -9

y = -2

Therefore making the solution, (-4, -2)

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