4.1 and 4.2 Equivalent Expressions
Expressions that represent the same quantity when the same
number is substituted for the variable in each expression are
equivalent expressions
called _______________________________________________.
Are the two expressions are equivalent
when x
12
+
12
2(4
+
12
+
2(7)
+
26
14
3)
=
4 ?
42
+
3(4
-
1)
+
42
+
3(3)
+
1
16
+
3(3)
+
1
16
+
9
+
1
1
26
Since both expressions are equal to 26, they
are equivalent expressions ONLY when x
= 4.