Question

c) 720 : [41 – (2x + 5)] = 40

giúp làm bài này với ạ:D

Answer 1

\(\text{720 : [41−(2x−5)] = 40720:[41−(2x−5)]=40}\)

\(\text{⇔41−(2x−5)=720:40}\)

\(\text{⇔ 41−2x+5=18}\)

\(\text{⇒ 46 −2x=18}\)

\(\text{⇔2x=28}\)

\(\text{⇔x=14}\)

Answer 2

40720:[41−(2x−5)]=40

            46 −2x=18

               2x= 46

              2x=46-18

              2x=28