Find the multiplicative inverse of [87] in Z150.
Use this answer to find all x in Z150 so that [87]x = [11].
Thanks guys
I understand your question as,Originally Posted by suedenation
Given the ring with unity $\displaystyle \mathbb{Z}_{150}$ find the multiplicative inverse of $\displaystyle 87$.
Thus, you need to solve the congruence,
$\displaystyle 87x\equiv 1\mod (150)$