Inequality
Disparity
noun, な adjective, の adjective
When something is not equal it suffers from inequality.
ふとう
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
コウイチは、トーフグの利えきを不等に分配するのがいやなんだよ。
Koichi doesn't want to distribute Tofugu's profits unevenly.
不等辺三角形の面せきを求める公式を知っていますか？
Do you know the formula to find the area of a scalene triangle?
私は連立不等式が得意です。
I’m pretty good at simultaneous inequalities.