k3+1=8
Subtract 1 from both sides of the equation.
k3=8-1
Subtract 1 from 8.
k3=7
k3=7
Multiply both sides of the equation by 3.
3⋅k3=3⋅7
Cancel the common factor of 3.
Cancel the common factor.
3⋅k3=3⋅7
Rewrite the expression.
k=3⋅7
k=3⋅7
Multiply 3 by 7.
k=21
k=21
Solve for k k/3+1=8