$-16+6x-30=-6+2\left( 5x-2 \right)$
Distribute $2$ through the parentheses$-16+6x-30=-6+10x-4$
Calculate the difference$-46+6x=-6+10x-4$
Calculate the difference$-46+6x=-10+10x$
Move the variable to the left-hand side and change its sign$-46+6x-10x=-10$
Move the constant to the right-hand side and change its sign$6x-10x=-10+46$
Collect like terms$-4x=-10+46$
Calculate the sum$-4x=36$
Divide both sides of the equation by $-4$$x=-9$