Write the Expression
Two time a number, then add 6
2x + 6
Variables
A letter or symbol representing a possible numerical value.
A number plus thirty equals twenty nine.
15 - 4x = 12
x = 1.5 or 3/4
A number times five equals fifteen, what number am I?
5x = 15
x = 3
A number divided by two minus fifteen
(x/2) -15
PEMDAS
It's the order of operations. Paretheses - Exponents - Multiplication - Division - Addition - Subtraction
80 -7x = 12
3 x (17 - y) = 9
14
A number taken away from ten then multiplied by four is negative eight. What number am I?
(10 - n) x 4 = -8
n = 12
A number times thirteen, subtracted from 20, then divided by 4.
(20 - 13x)/4
Equation
A statement that two expressions are equal.
2 x (n + 1)2 =10
(6/2)2 - (x + 6) = 24
- 9
A number squared minus twelve equals seventeen. What number am I?
x2 - 12 = 16
A number plus sixteen, squared, divided by four.
(x + 16)2 /4
Algebraic Expression
A mathematical expression containing a variable.
A number divided by four and six tenths taken away from ten equals thirteen hundredths.
10 - x/4.6 = 0.13
1.2 x 5 + y2 = (100 - 80) x 4
6
A number divided by four, then squared, then added to eleven equals
(x/4)2 + 11 = 92
x = 36
A number times itself plus seven, squared, times twenty-four.
(x2+7)2 x 24
Algebra
a part of mathematics in which letters and other general symbols are used to represent numbers and quantities in rules and equations.
A number squared plus one and four tenth, then squared, divided by eighty-nine, then added to twelve equals twelve hundredths.
[(x2 + 1.4)2 / 89] + 12 = 0.012
x / 1.5 + (3.2 - 0.8)2 = 55.6
- 3
A eight times a number added to nine and two tenths is negative one and two tenths. What number am I?
8x + 9.2 = 1.2
x = -1