SOLUTION: 7b+5-9b+c= x+2(x-y)= -5u+6+u+4u= (5x+y)-(4x-9)=

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Question 13908: 7b+5-9b+c=
x+2(x-y)=
-5u+6+u+4u=
(5x+y)-(4x-9)=
Answer by rahman(247) About Me  (Show Source):
You can put this solution on YOUR website!
(i) 7b+5-9b+c=7b-9b+c+5=(7-9)b+c+5=-2b+c+5
(ii) x+2(x-y)=x+2x-2y=(1+2)x-2y=3x-2y
(iii) -5u+6+u+4u=-5u+u+4u+6=(-5+1+4)u+6=0%2Au%2B6=6
(iv) (5x+y)-(4x-9)=5x+y-4x-(-9)=5x-4x+y+9=(5-4)x+y+9=x+y+9
OK