(640:y)*9-27=45 помогите

Question

(640:y)*9-27=45
помогите

Answer 1

45+27=72 72:9=8 640:8=80 Все

Comments

(640:y)*9-27=45

(640:y)*9=45+27=72

640:у=72/9=8

у=640/8=80