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September 5, 2015

Homework Help: Algebra help/ look over please

Posted by Lisa on Thursday, October 1, 2009 at 2:25pm.

Can you please look over these and let me know if they are right?
1/4(5x-1/2)-5/3<1/3
5/4x-1/8-5/3<1/3
24(5/4x-1/8-5/3)<24(1/3)
30x-3-40<8
30x-43+43<8+43
30x<51
x<51/30
{x|x<51/30}

31-(2x+2)< or equal to 4(x+1)+x
31-2x-2< equal to 4x+4+x
29-2x<equal to 5x+4
-2x<equal to 5x-25
-7x<equal to -25
{x|x>equal to 3.6}

Use elimination method: 4x+5y=-12 and 7x-5y=-76 I got x=-8 and y=4

elimination: 0.3x-0.2y=4 and 0.4x+0.5y=1 I got the solution of (220/23,-130/23)

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