r*(p*q)=(r*p)*q

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Solution for r*(p*q)=(r*p)*q equation: 


Simplifying
r(p * q) = (r * p) * q

Multiply p * q
r(pq) = (r * p) * q

Multiply r * pq
pqr = (r * p) * q

Multiply r * p
pqr = (pr) * q

Multiply pr * q
pqr = pqr

Add '-1pqr' to each side of the equation.
pqr + -1pqr = pqr + -1pqr

Combine like terms: pqr + -1pqr = 0
0 = pqr + -1pqr

Combine like terms: pqr + -1pqr = 0
0 = 0

Solving
0 = 0

Couldn't find a variable to solve for.

This equation is an identity, all real numbers are solutions.

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