Sagot :
5-2x=12
-2x=12-5
-2x=7 (multiplying by -1)
2x=-7
x= -7/2 = -3,5
5-2x=12
5-5-2x=12-5
-2x=7
x=7÷-2
or you can write 3.5
that's the best answer don't do anything else