x+11=6-(3-7x)
x+11=6-3+7x
8=6x
4=3x
x=4/3
LA repuesta es:
x+11=6-(3+7x)
x+11=6-3-7x
x+7x=6-3-11
8x=-8
x=-8/8
x=-1
COMPROBACION
(-1)+11=6-(3+7(-1)
10=6-(3-7)
10=6-(-4)
10=6+4
10=10