1. Solving One-Step Equations
Solving One-Step Equations - Sept. 15, 2010
Solving One-Step Equations
SEI.3.AC.1SLE 1: Solve, with and without appropriate technology, multi-step equations and inequalities with rational coefficients numerically, algebraically and graphically
Students will be able to solve one- step equations.

2. Rules for Solving Equations
We need to always remember that an equation is like a balance scale.
Whatever we do to one side of the equal sign, we must do to the other side.
x = 5
x = 3
– 2
= – 2
FHS
Equations and Inequalities

3. Rules for Solving Equations
We can add, subtract, multiply, or divide both sides of the equal sign by the same number.
We want to perform the opposite operation from the one shown in the problem.
The opposite of adding is
The opposite of subtracting is
The opposite of multiplying is
And the opposite of dividing is
subtracting
adding
dividing
multiplying
FHS
Equations and Inequalities

4. Equations and Inequalities
Solving Equations
Here are some examples:
x + 4 = 5
– 4 = – 4
x = 1
x – 2 = 3
+ 2 = +2
x = 5
3x = 15
x = 5
FHS
Equations and Inequalities