Vocabulary
an unknown value represented by a letter or symbol.
variable
addition
subtraction
x + 2 = 4
x=2
5x + 16 = 66
x = 10
2X+3+3 = -8
X= -7
a number that is multiplied or divided by a variable (stuck like glue)
coefficient
subtraction
addition
10 - x = 20
x = -10
3x - 10 = 26
x =12
-3 + 6a +5a = 19
a=2
a term that contains only numbers
constant
multiplication
division
5x = -25
x= -5
1/2x + 10 = 12
x = 4
2(x+5) = 25
x=12.5
numbers, operations, variable WITH an equal sign
equation
division
multiplication
x/4 = 6
24
-4 = 2/3x
x = -6
1/4 x = 5/2
x=10
operations that undo each other (opposites)
inverse operation
positive
negative
x - (-5 ) = 15
x = 10
25 = -5 + 2/3m
x = 45
6 = (-5+y) / -7
y=-37