Transcript Section 4.2b

4.2b – Solving Equations
Variables on both sides
Definitions of the Day (DODs)
• Inverse Operations (review)
• Variable (review)
Three Simple Steps to
Equation Solving Success
1.
(leave blank…not needed today)
2. Decide: variable on the left (of “=”)
or variable on the right
(there is no one right answer…just decide!!)
3. Using inverse operations, move the variable to one
side of the “=” and everything else to the other side.
SOLVE EACH EQUATION
a) 2 x  9  x  23
b)
15  6 x  4 x  25
SOLVE EACH EQUATION
a)
2
1
7
x  2 x
3
5
4
b)
100 7 9
x
  x
3
3 2
Your Turn!!
1. Solve:
a)
4.25  x  x  9.5
1
7
b) 1  x   x  3
7
8
Sentence Frames
1.
A letter or symbol that represents a number is called a
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2.
Operations that undo each other are called … ____
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