tentukan nilai X yang mememnuhi persamaa a. 7x + 1 = 8 - 4x b. 11 - x =3(2x-6) c. 5(3 - x) = 6 + 2x beserta cara kerjanya

a.
7x+1=8-4x
7x+4x=8-1
13x=7
x=7/13

b.
11-x = 3(2x-6)
11-x = 6x-36
-x-6x=-36-11
-7x = -47
x = 47/7

c.
5(3-x) = 6+2x
15-5x = 6+2x
-5x-2x= 6-15
-7x= -11
x= 11/7