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b)10y+(7x−8y+7)=10y+7x-8y+7=7x+2y+7
c)(5a−4b−6)+(−12a)=5a-4b-6-12a=-7-4b-6
d)(−8m+6n)+(3m−n)=-8m+6n+3m-n=-5m+5n
e)2+(65x+17)+(10−25x)=2+65x+17+10-25x= 40x+29
Zad2
A)7x−(3x−5)=7x-3x+5=4x+5
B)2.5m−(1.5m+2n−3)=2,5m-1,5m-2n+3=1m-2n+3
C)(8a−3b+2)−(−2a+8b)=8a-3b+2+2a-8b=10a-11b+2
D(45x−15y+9)−20x=45x-15y+9-20x=25x-15y+9
Zad3
A)(4x−2y)+(−6x)+5y−3)=4x-2y-6x+5y-3=--2x+3y-9
B)−7a+(−3a+5b)+(−7b)=-7a-3a+5b-7b=-10a-2b
C)8m+(3m+n)+(8n+9)=8m+3m+n+8n+8=11m+9n+8
D)(7x+6)+(−3m+5n−4)=7x+6-3m+5n-4=7x-3m+5n+2
Proszę :D