Combine Like Terms
4x+3x
7x
2x+3=9
x=3
x+5= 6
x=1
terms that have the same variable raised to the same power
Like Terms
5x + 9 = 2x + 21
x=4
12x+9x
21x
4x+10=30
x=5
x-10=5
x=15
The number in front of the variable
Coefficient
8x − 5 = 3x + 20
x=5
3x+2+5x
8x+2
7x-3=46
x=7
3x=24
x=8
a mathematical statement that shows two things are equal
Equation
7x − 6 = 3x + 22
x=7
2x+6x+7-4-x
7x+3
x/3+6=12
x=18
x/5= 8
x=40
a letter that represents an unknown number
Variable
4x + 12 = 2x + 24
x=6
4x+2y+3+3y+3x-2x
5x+5y+3
x/9-3= 6
x=1
x/12=12
x=144
the operation that undoes another operation
inverse operation
3x + 2x + 5 = 4x + 17
x=12