Wednesday

April 23, 2014

April 23, 2014

Posted by **chan** on Tuesday, May 14, 2013 at 2:14pm.

2x-3y=-4

- maths -
**Reiny**, Tuesday, May 14, 2013 at 3:21pmwhat are we doing?

solving?

keep the first as is: 5x+6y=37

double the second: 4x - 6y = -8

add them

9x = 29

x = 29/9

in the 1st:

5(29/9) + 6y = 37

times 9

145 + 54y = 333

54y = 188

y = 188/54 = 94/27

x = 29/9 , y = 94/27

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