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September 20, 2014

September 20, 2014

Posted by **lila** on Tuesday, December 21, 2010 at 9:22pm.

3x+3y=-6(this is a negative 6)

7x+4y= 1

- 8th grade math -
**Bosnian**, Tuesday, December 21, 2010 at 10:30pm3x+3y=-6

3y=-6-3x Divide with 3

y=-2-x

7x+4y=1

7x+4*(-2-x)=1

7x-8-4x=1

3x-8=1

3x=1+8

3x=9 Divide with 3

x=9/3

x=3

y=-2-x

y=-2-3

y=-5

x=3 y=-5

Cheking of results:

3x+3y=3*3+3*(-5)=9-15=-6

7x+4y=7*3+4*(-5)=21-20=1

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