-4*(-z+7)=z+17
4z-28=z+17
4z-z=17+28
3z=45
z=45:3
z=15
C-32=(c+8)*(-7)
C-32=-7c-56
C+7c=-56+32
8c=-24
C=-3
12-2*(k+3)=26
12-2k-6=26
-2k=26-12+6
-2k=20
K=20:(-2)
K=-10
<span>X*x*x=x³
k*k=k²
</span>(7-n)(7-n) =<span>(7-n)²;ї
</span><span>(x+1)(x+1)(x+1)</span> = (х+1)³;