Answer:
x = 11
Step-by-step explanation:
First put all the number on one side so its easier to add them up.
add the x's then do the regular numbers.
5x + 12x = -1 + 8 + 180
17x = 187
Then simplify it. so 17 can go into 187 11 times.
X = 11
Hope this helps, have a great day! :)
