Odpowiedzi

2010-01-29T19:25:48+01:00
A) 4a - ( -2a +3 ) =4a+2a-3=6a-3
b) -7x - ( 3y - 4x - 2 ) =-7x-3y+4x+2=-3x-3y+2
c) ( 4x - 7 ) - ( 10x + 2 ) =4x-7-10x-2=-6x-9
d) ( 2a +3 ) - ( a - 5 ) - ( -2a +1 ) =2a+3-a+5+2a-1=3a+7