Answers

2014-08-17T19:30:19+08:00
-[-4x-(3y-8x)] - [-8y-(2x-5y)] - [-2x+(4x-5y)]

= -(-4x-3y+8x) - (-8y-2x+5y) - (-2x+4x-5y)

= -(4x-3y) - (-2x-3y) - (2x-5y)

= -4x+3y+2x+3y-2x+5y

= -4x+11y
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2014-08-19T07:34:13+08:00