Answer:
The equation will be:
7*8 = 8*7
Explanation:
We need to find the values of triangle.
The given equation is:
7*____ = 8*____
It can be solved using commutative law of addition that states that:

In the given equation we have:
a = 7 and
b = 8
So, the equation will be:
7*8 = 8*7