Question

factoría :3
5x - 4=8% - 20
-6x=3(x-21)
3x -9 = x= 11
3x+ 10 =31​

Answer 1

Respuesta:

$-6x=3(x-21) \\ - 6x = 3x - 63 \\ 63 = 3x + 6x \\ 63 = 9x \\ 7 = x$

$3x+ 10 =31 \\ 3x = 31 - 10 \\ 3x = 21 \\ x = 7$