Question

Paul is solving an equation on the bottom of a page. His pen breaks, and ink spills on the corner of the page where the equation is written, as show.

Answer 1

forGiven the equation shown in the picture, you know that its solution is:

`x=6`

Therefore, you know that the value on the left side is:

`\begin{gathered} =6((6)+4) \\ =6(10) \\ =60 \end{gathered}`

If you substitute the value of "x" into the part of the expression that is not covered by the ink, you get:

`\begin{gathered} =6\mleft(6+7\mright) \\ =6(13) \\ =78 \end{gathered}`

Therefore, in order to both parts to be equal to 60, the number covered by the ink must be 18 or the expression covered by the ink must have a value of 18, because:

`78-18=60`

Hence, the answer is: Fourth option.