Question

I don't understand how x = 13 min 20 sec.please answer my question...I ll mark you as brainliest​

Answer 1

Answer:

90x=20(90-30)

90x=20×90-20×30

90x=1800-600

90x=1200

x=1200/90=13.33333

means 0.33333 =19.9888 second

approximately 19.9888=20 second

hence it convert into 13 min 20 s