Respuesta :

SillySushi
the final solutions are
X = 8
X = -4

Answer:

3 + 2x + 4 = 15

Add 3 and 4

2x + 7 = 15

We now need to find x

7 + 8 = 15

so X must be 4.

2 x 4 = 8

and we get...

8 + 7 = 15.

X = 4.