UWAGA ALGEBRA BARDZO PROSZE O POMOC Trzeba uprościć i obliczyc sumy 18a-12b-9-24a+17b-11= (x+9-8y)-9y-x+3= 7(3a+b)+2(a-5)-(b-4)= 6z-(5z+8)= 3(x-5)+2(3-2x)= 5ab-4b a=1/5. b=-2 Dam najjj

18a-12b-9-24a+17b-11=-6a+5b-20=(-6)×(1/5)+5×(-2)-20=-1,2-10-20=-31,2 (x+9-8y)-9y-x+3=x+9-8y-9y-x+3=-17y+12 7(3a+b)+2(a-5)-(b-4)=21a+7b+2a-10-b+4=23a+6b-6=23×(1/5)+7×(-2)-6=4,6-14-6=-15,4 6z-(5z+8)=6z-5z+8=z+8 3(x-5)+2(3-2x)=3x-15+6-4x=-x-9 5ab-4b=5×(1/5)×(-2)-4×(-2)=-2+8=6 Zależy mi na naj ;)