Question

1.- 5 a – 15 = 19





2.- 5x – 9 = 3 ( x – 2 )





3.- 4x – 8 = -4 ( 2x – 3 )





4.- 4x – 5 = 23





5.- 9 x + 7 = 25


ayuda mis pibilleros

Answer 1

Respuesta:

$1)5a - 15 = 19 \\ 5a = 19 + 15 \\ 5a = 34 \\ a = \frac{34}{5}$

$2)5x - 9 =3 (x - 2) \\ 5x - 9 = 3x - 6 \\ 5x - 3x = - 6 + 9 \\ 2x = 3 \\ x = \frac{3}{2}$

$3)4x - 8 = - 4(2x - 3) \\ 4x - 8 = - 8x + 12 \\ 4x + 8x = 12 + 8 \\ 12x = 20 \\ x = \frac{20}{12} \\ x = \frac{5}{3}$

$4)4x - 5 = 23 \\ 4x = 23 + 5 \\ 4x = 28 \\ x = 7$

$5)9x + 7 = 25 \\ 9x = 25 - 7 \\9x = 18 \\ x = 2$