4(3+c)+c=c+4
mutiply the bracket by 4
(4)(3)= 12
(4)(c)= 4c
12+4c+c= c+4
12+5c= c+4
Move c to the other side
Sign changes from +c to -c
12+5c-c= c-c+4
12+5c-c=4
12+4c= 4
Move +12 other side
Sign changes from +12 to -12
12-12+4c= 4-12
4c= -8
divide by 4 for both sides
4c/4= -8/4
c= -2
Answer: c= -2
