October 2018 2 91 Report

Dobrze rozwiązałam zadania z algebry?

2a+(3a-7)=2a+3a-7=5a-7

x-1(2x-3)=x-2x+3=1x+3

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

-(3a+6)-4=-3a-6-4=-3a-2

-(2x-1)-(3x+1)=2x+1-3x-1=-x+2

(4a-7b)-(2a+3b)=4a-7b-2a-3b=2a-10b

(2p-r)+(2r-p)=2p-r+2r-p=p+r

(x+y)+(x-z)+(z-y)=x+y+x-2+2-y=2x

3x-y-(x-1-(-3x)-y)=3x-y-x+1-3x+y=5x+1


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