Expression or Equation?

1
5z 32 47
2x 16
Expression or Equation?
3x 7
4y 10 54
(8x 1)2 y
6x 2y
2
Objectives
1. To be able to recognize the difference
between an expression and an equation.
2. To be able to solve one step equations using
a physical model.
3
Expression or Equation?
4
Solving One Step Equations involving adding and
subtracting.
What do need to do to both sides of the equation
to get the variable by itself?
x 7 -13
What happens to the left side of the equation?
-20
x
What happens to the right side of the equation?
What is the solution of the equation?
5
Solving One Step Equations.
What would the previous equation look like if
we used physical models to express it?
x 7 -13
6
Solving One Step Equations.
What would the following equation look like if
we used physical models to express it?
-5 y - 12
7
Solving One Step Equations.
What would the following equation look like if
we used physical models to express it?
14 a - 9