Respuesta :

Step-by-step explanation:

5x-30=3x

5x-3x=30

2x=30

Divide by 2 for 2x and 30

x=15

Check answer subsituition method:

5x-30=3x

5(15)-30=3(15)

75-30=45

45=45

Answer: x=15 ( choice 3)