Question

140 : ( 4x + 8 ) = 7

Answer 1

theo mìnhb là thế này

140:( 4x + 8 ) =7

4x +8=140:7

4x + 8 =20

4x =20-8

4x=12

x=12:4

x=3

Answer 2

4x +8=140:7

4x+8=20

4x=20-8=12

x=12:4=3

Answer 3

140 : (4x + 8) = 7

<=> 4x + 8 = 140 : 7 = 20

<=> 4x = 20 - 8 = 12

<=> x = 12 : 4 = 3