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b) x+2
c) -4x-5
d) -x-4
f) -5x
g) -2x+1
h) -7x-6
i) -1
spr.:
-6x-3+x+2-4x-5=-9x-6 (a+b+c)
-x-4+(-3x)-2+(-5x)=-9x-6 (d+e+f)
-6x-3+(-3x)-2+(-1)=-9x-6 (a+e+i)