An equation is a statement that shows two expressions are equal

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OBJECTIVE: Students will be able to solve equations with one variable.
An equation is a statement that shows two expressions are equal (using and equal sign).
When we solve the equation, we are being asked to solve for the variable.
Her are some things to remember…
 If necessary, combine the like terms.
 Every operation you perform on one side of an equation must be performed on
both sides of the equal sign.
When solving equations, remember that addition and subtraction are inverse
operations – they undo each other. To solve equations using addition and subtraction,
first decide which operation has been applied, then use the inverse operation to undo
this. Remember to add or subtract from both sides of the equation.
b5  3
a  7  10

c  4  2c  5


When solving equations, remember that multiplication and division are inverse
operations – they undo each other. To solve equations using multiplication and
division, first decide which operation has been applied, then use the inverse operation
to undo this. Remember to multiply or divide from both sides of the equation.
y
 62
10
6x  48


1
2
z  z  10
5
5

To solve complex equations, the one thing to remember is that you need to get the
variable isolated before you can solve the equation. When dealing with many different
operation, work backwards from PEMDAS…or….SADMEP! As long as you always do
the same thing to BOTH sides of the equation, and do the correct order, you will get to
the solution.
1
x 10  42
2
2t  7  25


5(3x 1)  20x  5

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