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September 19, 2014

September 19, 2014

Posted by **Anonymous** on Sunday, January 23, 2011 at 2:37pm.

4x - 9= -15

-3x - 4y = 22

- college math 209 -
**Henry**, Monday, January 24, 2011 at 8:01pmEq1: 4X - 9 = -15

Eq2: 3X - 4Y = 22.

Solve for X in Eq1:

4X - 9 = -15,

4X = -15 + 9,

4X = -6,

X = -6/4 = -(3/2).

Substitute -3/2 for X in Eq2:

3(-3/2) - 4Y = 22,

-(9/2) - 4Y = 22,

Multiply both sides by 2:

-9 - 8Y = 44,

-8Y = 44 + 9 = 53,

Y = -(53/8).

You show only 1 variable in Eq1; i

assumed that is correct.

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