Question

What is 2x + 5 = 15 - (-49) x 5

Answer 1

2x + 5 = 15 - (-49) x 5 
combine like terms 

2x + 5 = 320 
subtract 5 from each side 

2x = 315
divide by 2 on each side

x = 157.5

Answer 2

So, you do -49 * 5 first because multiplication is before addition, which is -245. 
15 - (-245) turns into addition, so the right side of the equation is 260. 

Move the 5 over. 260-5 = 255

2x = 255, so x =255/2 or 127.5