X+3/4=7/8 solve equation

1/8

3/4 changes into 6/8

7-6=1/8

X+3/4=7/8, you need to set x by it self, if the number on the other side goes to the other it became the opposite so it become - 3/4, multiply 4 by 2 so you'll get the same denominator as the other number, and 3 by 2 too because if u do something with the denominator u have to with the top one too so you'll get x=7/8-6/8 so x=1/8