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c)2x-5x+7-x=-4x=7
d)2a+b-4b=2a+(-3b)=2a-3b
e)x-2x+3+x-4=-1
f)3x-y+4x-2y=7x-3y
g)2x-6+4x+2=6x-4
h)3y-5-5y-6=-2y-11
i)-2a+2b-3a-3b=-5a-1a
j)½t-2x+3t-x-t=-1,5t-3x
c)2x-5x+7-x= -4x + 7
d)2a+b-4b=2a - 3b
e)x-2x+3+x-4= -1
f)3x-y+4x-2y= 7x - 3y
g)2x-6+4x+2= 6x - 4
h)3y-5-5y-6= -11-2y
i)-2a+2b-3a-3b= -5a -b
j)½t-2x+3t-x-t= -3x+ 2½ t