Equations
3x + 9 = 30
x = 7
-2 - 5 =
-7
the name for the unknown number that is represented with a letter
variable
3+(9-1)
11
2x + 5x
7x
4(2x-5) = 60
x = 10
- 12 + 6 =
-6
the name for a number whose value will always remain the same (no variable)
constant
3+2·2-6
1
2x - 5x - 4y + 2y
-3x - 2y
x/3 + 5 = 4(5)
x = 45
-12 / 3 =
-4
the number in front of a variable in a variable term
EX: 5x (what is the 5 called?)
co-efficient
2(3-1)+4
8
2x · 5 + 2 · 3y
10x + 6y
5x + 10 = 2 (x-10)
x = -10
(-8) · (-2)
16
Numbers, symbols and operations (such as + and ·) grouped together that represent the value of something
expression
5·2-3(3-2)-10
-3
5(x + 5) - 3(z -4)
5x + 37 - 3z
Solve for Y.
3(y-6)-18 = 6(x+2) + 24
y = 2x + 24
-3(5 - 2)
-9
A mathematical expression that shows the value of the expression using an equal sign
equation
2(x-4) + 3y - 10 -3(y-2)
2x-12
15 + 3(2x - 6) - 2(y+3) - 10
6x - 2y -19