D46L Lesson One-Step Eq

mathematical phrase with a combination of numbers, variables, and operations

does not have an equals sign

Equation

a mathematical sentence stating two expressions are equivalent

has an equals sign

only used in equations!

use inverse operations to isolate the variable

keep the equation balanced by performing the same operation on both sides of the equals sign

Solve means...looking for the value(s) that will make the statement true

subtract 6 from both sides      3 - 6 =  $\Omega$   + 6 - 6

simplify                                      $\Omega$   = -3

add 6 from both sides      3 + 6 =  $\Omega$   + 6 +6

simplify                                       $\Omega$   = 9

keep change change                   Ω + 2 = -15

subtract 2 from both sides.        Ω+ 2 - 2 = -15 - 2

simplify                                          Ω = -17