Slide 1
1. Simplify: 2(x + 3)
2. Simplify: 3[(5 + 72) – 20]
= 2x  6
= 3[(5 + 49) – 20]
= 3[(54) – 20]
= 3[34]
= 102
Slide 2
3.1
Solving Equations by Adding and Subtracting
Slide 3
t + 5
=
11
5
5
t
=
6
+ 0
Example 1
Slide 4
Now you try…
y + 3
=
2
3
3
y
=
5
+ 0
Example 2
Slide 5
a  4
=
10
+4
+4
a
=
6
+ 0
Example 3
Slide 6
Now you try…
x  6
=
6
+6
+6
x
=
0
+ 0
Example 4
Slide 7
4 + x
=
30
+4
+4
x
=
26
0+
Example 5
Slide 8
Now you try…
4.6 + m
=
0
4.6
 4.6
m
=
4.6
0 +
Example 6
Slide 9
+ b
=

Example 7
Now try a more challenging problem…
 +
0 +
b
=
1