zad 30 wykonaj działania a}6{x-4}-2 b}2(x+1)-3(x-1) c)-3(y-2)+4(y+2} d}5(x-y-1)-4(x+2) e}2(3a+b)-2{a-b) tylko że to jest na jutro:)

a] 6(x-4)-2=6x-24-2=6x-26 jeśli masz wyliczyć x, to:6x=26 x=26:6 x=4⅓ b] 2(x+1)-3(x-1)=2x+2-3x+3=-x+5 -x=-5 x=5 c] -3(y-2)+4(y+2)=-3y+6+4y+8=y+14 y=-14 d] 5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13 e] 2(3a+b)-2(a-b)=6a+2b-2a+2b=4a+4b

a}6{x-4}-2=6x-24-2=6x-22 b}2(x+1)-3(x-1)=2x+2-3x+3=-x+5 c)-3(y-2)+4(y+2}=-3y+6+4y+8=y+14 d}5(x-y-1)-4(x+2)=5x-5y-5-4x-8=x-5y-13 e}2(3a+b)-2{a-b)=6a+2b-2a+2b=4a+4b