Question

14400/(270-х)+520＝1200​

Answer 1

14400/(270-х)+520＝1200

14400/270-х+520＝1200

14400/790-x = 1200 /× 790-x

14400=1200(790-x) /: 1200

12=790-x

x=790-12

x=778

Ответ: х=778