Solve 5x + 3y = -9 for y. help?

2009-09-15 11:46 am

Solve 5x + 3y = -9 for y.

A.y = 3/5 x -3
B. y = -5/3 x -3
C.y = -5/3 x -9
D.y = -5/3 x + 9

回答 (11)

2009-09-16 1:34 am

✔ 最佳答案

5x + 3y = - 9
3y = - 5x - 9
y = - 5/3x - 3

Answer: B. y = - 5/3x - 3

Checking:
5x - 3(- 5/3x + 3) = - 9
5x + 5x - 9 = - 9
- 9 = - 9

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2009-09-15 6:50 pm

B. y = -5/3x -3

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2009-09-16 2:55 pm

3y = - 5x - 9

y = (- 5/3) x - 3

OPTION B

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2009-09-16 9:43 am

B

1. Subtract both sides by 5x.
2. Divide both sides by 3.

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2009-09-15 11:53 pm

y=(-5x-9)/3=>
y=-5x/3-3

B

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2009-09-15 11:46 pm

5x + 3y = -9
3y = -5x - 9
y = (-5x - 9)/3
y = -5x/3 - 9/3
y = -5/3(x) - 3
(answer B)

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2009-09-15 9:36 pm

5x+3y=-9

3y=-5x-9
3y/3=-5/3x-9/3 B

y=-5/3x-3

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2009-09-15 7:15 pm

3y=-5x-9
y=(-5x-9)/3
y=-(5x+9)/3

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2009-09-15 6:57 pm

5x+3y = -9;
3y = -5x - 9 ;
y = (-5x - 9)/3;
y = -(5/3)x - 9/3;
y = -(5/3)x - 3

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2009-09-15 6:52 pm

so you want to isolate y ...

- subtract the x part from both sides of the equation
- then reduce both sides to a single y by dividing

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