63-6x=3^2
63-6x=9
6x=54
x=9
-x+54=0
x-54=0
x=54
(под корнем63-6x)^2=3^2
63-6x=9
X=54:6
x=9
63-6x=9
-6x=-54
6x=54
x=9
63–6x=32
63–6x=9
6x=54
x=9
(√63–6x)=(3)
63-6х=9
-6х=9-63
-6х=-54 |:(-6)
х=9