The correct answer is X+6?

X-6=6？

x= 12？

x+6= 12+6= 18

Solve the equation and write the inspection process:

1. Substitute the unknown value into the original equation.

2. What's on the left? Is it right?

3. Judge whether the unknown value is the solution of the equation.

For example: 4.6x=23

Solution: x=23÷4.6

x=5

Check:

Substituting x = 5 into the equation, we get:

Left =4.6×5

=23= Right

So x=5 is the solution of the original equation.