The process of (3x + 7) / 4. - 1 = (5x + 5) / 6

The process of (3x + 7) / 4. - 1 = (5x + 5) / 6

Multiply both sides by 12 at the same time
3(3x+7)-12=2(5x+5)
To get rid of the brackets, you have to
9x+21-12=10x+10
Transfer, get
9x-10x=10-21+12
Merge the similar items to get
-x=1
If the coefficient is changed to 1, the result is as follows
x=-1