Question

a+12=a
-2x-3=3
5-b-=2
-x+12=a
8-(c+6)=5
x/3+5=x+7

Answer 1

a-a= -12
0 = -12
seria a+12= -a
daria a+a=-12
2a=-12
a=-12/2
a=-6

-2x-3=3
-2x= 3+3
-2x= 6
x=6/-2
x= -3

5-b=2
-b=2-5
-b= -3
b=3

-x+12=a
-x-a=-12
x+a=12

8-c-6=5
-c+2=5
-c=5-2
-c=3
c=-3

x/3-x=7-5
x-3x/3=2
-2x=6
x=6/-2
x=-3