Question

quantos que e 2x-3= 7(x-4)

Answer 1

2x-3 = 7(x-4)
2x-3 = 7x-28
2x-7x = -28+3
-5x = -25 (.-1)
5x = 25
x = 25/5
x=5

Answer 2

Olá Thaires!

$2x - 3 = 7 ( x - 4 ) \\ 2x - 3 = 7x - 28 \\ 2x - 7x = - 28 + 3 \\ - 5x = - 25 \\ 5x = 25 \\ x = \frac{25}{5} \\ x = 5$

Prova real:

$2x - 3 = 7 ( x - 4 ) 2 . ( 5 ) - 3 = 7 ( 5 - 4 ) 7 = 7$


Tenha ótimos estudos !