Explanation:
when we consider what is all truly equal in both sides of the equal signs, we get a rather simple situation, because we can eliminate the equal parts on both sides. remember, addition has the associative property.
that gives us
3 = 2/3 m
9 = 2m
m = 9/2
and
H = [-2 8 1]
m × H = 9/2 × [-2 8 1] = [9/2 × -2 9/2 × 8 9/2 × 1] =
= [-9 36 9/2]