Respuesta :

Answer:

-5×+12-7×=-3(5×+8)

-5×+12-7×=-15×+24

-12×+12=-15×+24

-12×+12=-15×+24

3×+12=24

3×=12

×=4

Step-by-step explanation:

-5×+12-7×=-3(5×+8)

-5×+12-7×+24

-12×+12=-15×+24

-12×+=-15×+24