а) m+2n = 6+23 = 6+6 = 12m+2n = 4+22 = 4+4 = 8
б) 3c-d = 31-0 = 33c-d = 33-0,9 = 9-0,9 = 8,1
в) x+2y-3z = 10+225-320 = 10+50-60 = 0
г) a+b-c = 2/3+1/6-1,4 = 2/3+1/6-1,4 = 4/6+1/6-4,2 = 5/6-4,2 = 5/6-24/10 = 5/6-12/5 = 25/30-72/30 = -47/30
а) m+2n = 6+23 = 6+6 = 12
m+2n = 4+22 = 4+4 = 8
б) 3c-d = 31-0 = 3
3c-d = 33-0,9 = 9-0,9 = 8,1
в) x+2y-3z = 10+225-320 = 10+50-60 = 0
г) a+b-c = 2/3+1/6-1,4 = 2/3+1/6-1,4 = 4/6+1/6-4,2 = 5/6-4,2 = 5/6-24/10 = 5/6-12/5 = 25/30-72/30 = -47/30