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October 20, 2014

October 20, 2014

Posted by **Rox** on Wednesday, February 27, 2013 at 1:39am.

- maths -
**Henry**, Thursday, February 28, 2013 at 6:39pmX = 4y-a = 1

4*2 - a = 1

a = 7.

Y = 4x - b = 2

4*1 - b = 2

b = 2.

a + b = 7 + 2 = 9.

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