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Variables in Expressions and Equations
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The result of 2 less than half of a number is 0
x/2 - 2 = 0 OR 0.5x - 2 = 0
the result of a number subtracted from 10 is 4
10 - x = 4
a number divided by 2 is 14
n/2 = 14 OR n Ă· 2 = 14
7 multiplied by a number
7n OR 7 x n
4 divided by a number
4/n OR 4 Ă· n
when a number is increased by 3 the result is 7
x + 3 = 7
the sum of 6 and a number is 15
6 + n = 15
a number decreased by 5
n - 5
What is the difference between an expression and an equation?
Equations involve EQUALS
What is an equation?
a mathematical statement of equality between two expressions
What is an expression?
a mathematical statement that can consist of numbers, variables, and/or operations
What is a variable?
a letter or symbol that is used to represent a quantity or number
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