China | A Nice Algebra Problem

[@mikebolt3753]

Student: I did it in my head
Teacher: show me your work
Student: No.

[@dollykahar7837]

keep it up I'm with you bro

[@claudiobuttazzo4513]

In just half second X=1 because 7 times 5 need to be equals to 35.

[@thodorissiorikis8791]

Τέλειο-Perfect!!!!!

[@Davidus_Belisarius]

Γεια σου! Πώς είσαι, φίλε μου; I'm russian and I learn greek language) I like your history and language

[@ybs3642]

may i know the titles of background music?

[@dardoburgos3179]

X= 1.

[@rabotaakk-nw9nm]

x1=1; x2=-ln35/ln7≈-1.827 😁

[@wiktorporebski9319]

Is it 1?

[@quantumbuddha777]

Yes, and... there's a negative solution too, because the function is concave up with a minimum at (0,1). Separate your 5s and 7s and log both sides. Factor out an (x-1) and you'll get the other solution.

[@user-yc4wh8lh8b]

Good

[@jabi3616]

You can just do x=1. No need for these hard calculations

[@Garden_Of_Eden_]

😂

[@Garden_Of_Eden_]

By inspection right?

[@Garden_Of_Eden_]

But 1 is not the only answer

[@jabi3616]

@@Garden_Of_Eden_ ik dude but just seeing the equation we can already determine 1 solution

[@Garden_Of_Eden_]

@@jabi3616 Sure!