# Question 4a4b6

$\left(3 + x\right) - 2 = 1 + x$
color(white)("XXX"){: ("(",3, "+",color(red)(9),")", -2 ,"=",1,"+", color(red)(9)),("(",3, "+",color(red)(4),")", -2 ,"=",1,"+", color(red)(4)),("(",3, "+",color(red)(90),")", -2 ,"=",1,"+",color(red)( 90)) :}#
We can see that except for the two identical columns (in $\textcolor{red}{\text{red}}$) all the entries down the table are identical.
Therefore, the $\textcolor{red}{\text{red}}$ entries become the variable and everything else are constants