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Subtract 25 from whatever variable you use for "a number". If your number is "x", then the expression becomes "x - 25".
x - 10
An algebraic expression for "6 less than 5 and a number" is (5 - x - 6), where x represents the unknown number.
The algebraic expression for "4 less than the sum of a number and 5" is (n + 5) - 4, where n represents the unknown number.
It could be: 32-x
As an algebraic expression it is: 2x-9
Subtract 25 from whatever variable you use for "a number". If your number is "x", then the expression becomes "x - 25".
You write it as5nNothing more, nothing less.
12-3/4x
(4n) - 25
a - 4
4<x
m - 12
M < 90
It is: y-4
x - 10
An algebraic expression for "6 less than 5 and a number" is (5 - x - 6), where x represents the unknown number.