Odpowiedzi

2010-03-10T16:20:32+01:00
A)3(5x-2)-2(8x-5)= 15x-6 -16x+10=-x+4 -2+4=2
b)(3a+27):3+(-6a+12):(-6)=a+9+a-2=2a+7 2(-5) + 7=-10+7=-3
c)(-8m+4p-12):(-4)-3(2m-p+3)=2m-p+3-6m+3p-9=-4m+2p-6 -4(-1)+2*3-6=4+6-6=4
d) -2(4y+5)+3(y-2)-(-8y-9)=-8y-20+3y-6+8y+9=3y-17 3(-2)-17=-6-17=-23