addition method

G

Guest

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Okay, this is my last question for today.

8/5x+3y=1
2/3x+4/9y=-2

I'm having trouble with using the addition method because of the fractions. Can someone help?
 
batbat said:
8/5x+3y=1
2/3x+4/9y=-2
A good general rule: "If you don't like fractions, get rid of them."

8/5x+3y=1
Multiply by 5
8x+15y=5

2/3x+4/9y=-2
Multiply by the LCD, 9
6x+4y=-18
Divide by Common Factor, 2
3x+2y=-9

Can you do it from here?

8x+15y=5
3x+2y=-9
 
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