Suppose Xiao Yong votes X, then Dad votes 6x.

x+6x=42

7x=42

x=6？

Dad: 6x = 6x = 6x=6×6=36.

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.