a)3x-2y+5x-6y-x b)0,3a+0,4b - ,6a +2/5b c)8z-1/4z-1/8z+3/4z+z d)2ab-2b+ab-5a-6b

a)3x-2y+5x-6y-x=3x+5x-x-2y-6y=7x-8y b)0,3a+0,4b - 0,6a +2/5b=0,3a-0,6a+0,4b+2/5b=-0,3a+0,4b+0,4b=-0,3a+0,8b c)8z-1/4z-1/8z+3/4z+z=8z-2/8z-1/8z+6/8z+z=9i3/8z d)2ab-2b+ab-5a-6b =2ab+ab-2b-6b-5a=3ab-8b-5a

a 7x-8y b -5,7a+0,8b c10 i 1/8z d 3ab-8b-5a