I think the math questions was translated (or worded) incorrectly here. For example, for the first questions, usually it sounds like, "For the equation blablabla, find the value of a,b,c if a,b,c are constants and x is the variable." But I can be wrong, can natives confirm this? (Sorry, I'm from an ESL country.)
I hope the translator take this as a positive constructivism instead of a harsh critic or a hate comment
Also, maybe it was not the translator's fault, but instead the questions in the raw themselves were originally worded like that.
(I tried to translate the raw by myself but some of the kanji are beyond me.)