Don’t take my word for it but I think 3rd option
You combine like terms which are -10x and 7x and 1 and 37. Then it becomes -3x=36. x would equal to 36/-3, which is -12.
7x-4x=10-1
3x=9
3/3x=9/3
x=3
All you have to do is divde hope this helps thank ylu
