a) -6(-3x+1)-(4x+10)-5x dla x=-2
b) 10(2x+1-y)-(8x-3y+6) dla x=-1 y=2
c) -4(5z-w-1)-(4-9z)+8w dla z=-1 w=3
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a) 18x-6-4x-10-5x=9x-16=9*(-2)-16= -18-16 = -34
b) 20x+10-10y-8x+3y-6= 12x-7y+4= 12*(-1)-7*2+4=-12-14+4 = -22
c) -20z+4w+4-4+9z+8w= -11z+12w=-11*(-1)+12*3= 11+36 = 47