a) -2x-4y+5x-7y=
b) -2x+4-3x-7y=
c) -4(2x-6)-(6x+5)=
d) 6(a-4)-3(2a-5)+2a-7=
e) 5(x-3y+4z)-(4x-z+2y) =
a) -2x-4y+5x-7y= 3x -11y
b) -2x+4-3x-7y= -5x - 7y + 4
c) -4(2x-6)-(6x+5)= -8x+24-6x-5 = -14x + 19
d) 6(a-4)-3(2a-5)+2a-7= 6a-24-6a+15+2a-7 = 2a - 16
e) 5(x-3y+4z)-(4x-z+2y) =5x-15y+20z-4x+z-2y = x - 17y + 21z
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a) -2x-4y+5x-7y= 3x -11y
b) -2x+4-3x-7y= -5x - 7y + 4
c) -4(2x-6)-(6x+5)= -8x+24-6x-5 = -14x + 19
d) 6(a-4)-3(2a-5)+2a-7= 6a-24-6a+15+2a-7 = 2a - 16
e) 5(x-3y+4z)-(4x-z+2y) =5x-15y+20z-4x+z-2y = x - 17y + 21z