first you distribute -5 by the numbers in the ()’s as u can see for this part -(x-5y+3z) it doesn’t have a number I front of the ()’s so that becomes 1 so now the equation is -5(4x-6y+2x)-1(x-5y+3z) so u distribute -5 by the ()’s and -1 by the ()’s the equation should look like this -20x+30y-10x-1x+5y-3z combine them now -20x-10x-1= -31x ....... 30y+5y= 35y ...-3z new equation -31x+35y-3z = 1 so the answer will be -31x+35y-3z