This model represents the expression
x
+
x
+
1
+
1
.x
x
1
1
Which expression is equivalent to
x
+
x
+
1
+
1
?4
x
3
x
+
1
2
x
+
2
2
x
+
3
ref_doc_title.
Jumping to level 1 of 1
Excellent!
Now entering the Challenge Zone—are you ready?
Now entering the Challenge Zone—are you ready?