Odpowiedź:
[tex]-2x+8y-(6x-7y)=-2x+8y-6x+7y=-8x+15y\\\\(3u-6v)+(6v-5)=3u-6v+6v-5=3u-5\\\\(8u+3v)-(2u+5v)=8u+3v-2u-5v=6u-2v\\\\(-a-4b)+(5b-a)=-a-4b+5b-a=-2a+b\\\\(7a-b)-(4a-2b)=7a-b-4a+2b=3a+b\\\\\\(3s-12t+9):3=3s:3-12t:3+9:3=s-4t+3\\\\(4x+6y-8v):2=4x:2+6y:2-8v:2=2x+3y-4v\\\\(-15u-20w+5):5=-15u:5-20w:5+5:5=-3u-4w+1[/tex]
