Odpowiedzi

2010-03-11T23:30:44+01:00
A) 5x+ (2x-7)-9x-(-3x+8)+20-8x
5x+2x-7-9x+3x-8+20-8x= -7x+5

b) -5x+(-2y+4x)-(7x-8y)-x+(2-6y)
-5x-2y+4x-7x+8y-x+2-6y = -9x+2

c) -9z-(4-3z)-8y-(-7z+8y)+(-2y-7)
-9z-4+3z-8y+7z-8y-2y-7 = z-18y-11
77 4 77
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2010-03-11T23:32:13+01:00
A) 5x +2x -7 -9x +3x -8 +20 -8x
-7x +5
b) -5x -2y +4x -7x +8y -x +2 -6y
-9x +2
c) -9z -4 +3z -8y +7z -8y -2y -7
z -18y -11
129 4 129