a)
b)
c)
d)
e)
f)
g)
a) -3x+ 7x - x+2x-8x=9x-9x-3x=-3x
b)6x - 7y - 4 +2x +11y - 3 +9x+3 =17x+4y-4
c)x^2 + 2x - 3 -2x^2 - 1 - x^2 + 2x =-2x^2+4x-4
d)5a + (5 - 4a) =5a+5-4a=a+5
e)2x- 5- (x- 3) =2x-5-x+3=x-2
f)(2b - 3c)-(-3b+7c)=2b-3c+3b-7c=5b-10c
g)(4a- 5) - (5a+ 4)+ (2a +1) =4a-5-5a-4+2a+1=a-8
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a)
b)
c)
d)
e)
f)
g)
a) -3x+ 7x - x+2x-8x=9x-9x-3x=-3x
b)6x - 7y - 4 +2x +11y - 3 +9x+3 =17x+4y-4
c)x^2 + 2x - 3 -2x^2 - 1 - x^2 + 2x =-2x^2+4x-4
d)5a + (5 - 4a) =5a+5-4a=a+5
e)2x- 5- (x- 3) =2x-5-x+3=x-2
f)(2b - 3c)-(-3b+7c)=2b-3c+3b-7c=5b-10c
g)(4a- 5) - (5a+ 4)+ (2a +1) =4a-5-5a-4+2a+1=a-8