One Step (+, -)
X + 5 = 9
X = 4
3x = 12
X = 4
2x + 3 = 7
x = 2
X/2 + 1 = 5
X = 8
An operation that "undoes" another operation is called an _________________ _____________________.
inverse operation
X - 8 = 3
30 = 5X
X = 6
4x + 5 = 9
X = 1
When Verifying an equation make sure that the Left Side equals the .
Right Side
What do you do to the following equation to get the variable by itself on one side of the equal sign? m - 9 = 12
add 9
X + 9 = 16
X = 7
X/2 = 12
X = 24
3x - 8 = 7
X = 5
x/3 + 5 = 11
X = 18
What do you do to the following equation to get the variable by itself on one side of the equal sign? m + 22 = 213
subtract 22
X - 13 = -6
X = 7
x/7 = 1
x = 7
-x + 7 = -3
x = 10
x/4 + 6 = - 2
x = -8
What do you need to do to the following equation to get the variable by itself on one side of the equal sign? -7m = -49
divide by -7
X = 10
-4X = 44
x = -11
14 = -3x - 4
x = -6
-7x - 4 = 14 + 3
x = -3
What do you do to the following equation to get the variable by itself on one side of the equal sign? m/-12 = 3
multiply by -12