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October 21, 2014

October 21, 2014

Posted by **Hanad** on Saturday, December 7, 2013 at 12:15am.

2x-5x=-8

-3x-2y=-26

- Math -
**Reiny**, Saturday, December 7, 2013 at 12:28amDid you mean 2x - 5y = -8 for the first one ?

I will assume that is what you meant:

Personally I would not use substitution, but ....

from the 2nd

26-3x = 2y

(26-3x)/2 = y

into the 1st:

2x - 5(26-3x)/2 = -8

times 2 to get rid of that fraction ...

4x - 5(26-3x) = -16

4x - 130 + 15x = -16

19x = 114

x = 6

then y = (26-18)/2 = 4

x = 6 , y = 4

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