Question

tìm x

 (3x-7)+2.(5-2x)+5x=19

Answer 1

\(\text{ (3x-7)+2.(5-2x)+5x=19}\)

\(3x-7+10-4x+5x=19\)

\(3x-4x+5x=19+7-10\)

\(4x=16\)

\(x=16:4\)

\(x=4\)

vậy______

Answer 2

\(\left(3x-7\right)+2\left(5-2x\right)+5x=19\)

\(3x-7+10-4x+5x=19\)

\(4x=19+7-10\)

\(4x=16\)

\(x=4\)

vậy \(x=4\)

Answer 3

Vân Nguyễn:

(3x -7) + 2.(5 - 2x) + 5x = 19

3x - 7 + 10 - 4x + 5x = 19

3x - 4x + 5x = 19 + 7 - 10

4x = 16

  x = 16 : 4

  x = 4

Vậy x = 4

:)