40a+58b =
13x+3c+71z
-9a-3x+2a+8x-3c=
4x+2y
-8x+10y+12x-8y=
a
3x+x =
18b-20b=
a+7a+3x+2c+x+c=
6a+6a=
-7a+5x+2a-3c
-2b
8a+4x+3c
4x
2x+8x=
7a-6a=
12a
9x+3c+71z+4x=
10x
40a+58b
