Odpowiedzi

2010-02-17T20:15:45+01:00
A) 4c-(3c+2)-10c= 4c-3c-2-10c = -9c-2
b) 7x-8-(5x+6)= 7x-8-5x-6 = 2x-14
c) 9y-(8-3y)+16= 9y-8+3y+16 = 12y+8
d) 5x-(2-4x)+8x-7= 5x-2+4x+8x-7 = 17x-9
e)-(-5c-8)+6-9c-c= 5c+8+6-9c-c = -5c+14
f)-4(3x-6)-3(2+7x)= -12x+24-6-21x = -33x+18
g)5(3z-7)-9(-8z-6)= 15z-35+72z+54 = 87z+19
h)-3(5x-4)+8(-3x+2)= -15x+12-24x+16 = -39x+28
i)7x-3(5x+2)-6(7+2x)= 7x-15x-6-42-12x = -20x-48
j)-5(3y-7)-2(6+4y)+3y= -15y+35-12-8y+3y = -20y+23
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