Respuesta :
remember that you can do anyting to an equaiton as long as you do it to both sides
-2x+15=-3x+9
add 2x both sides
15=-x+9
minu s9 both sides
7=-x
times -1
-7=x
-2x+15=-3x+9
add 2x both sides
15=-x+9
minu s9 both sides
7=-x
times -1
-7=x