Question #4a4b6

1 Answer
Aug 28, 2015

Answer:

#(3+x)-2 = 1+x#

Explanation:

Consider the given equations in tabular form so we can see the pattern:
#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 #color(red)("red")#) all the entries down the table are identical.
Therefore, the #color(red)("red")# entries become the variable and everything else are constants