Question

a) -4x+(3x-1)=

b) 3x-y-(2y-x)=
c) (2-3x)-(2x-3)=
d) (3x-2)-(3x-4)+2(-6+1)=
e) 7(2a-3b)-2(a-4b)-7(-2a-b)=
f) -(2x+y-z)+3(-4x-y+2z)-4(y-7x+2z)-x+y-z=

Answer 1

a)

-4x+(3x-1)= -4x + 3x -1 = -x -1

 

b)

3x-y-(2y-x)= 3x – y – 2y + x = 4x – 3y

c)

(2-3x)-(2x-3)= 2 – 3x – 2x + 3 = -5x + 5

d)

(3x-2)-(3x-4)+2(-6+1)=  3x -2 -3x +4 -12 + 2 = -8

e)

7(2a-3b)-2(a-4b)-7(-2a-b)= 14a – 21b – 2a + 8b + 14a + 7b = 26a - 6b

 

f) -(2x+y-z)+3(-4x-y+2z)-4(y-7x+2z)-x+y-z=

= -2x – y + z – 12x – 3y + 6z – 4y + 28x  - 8z –x + y – z=

= 13x - 7y – 2z