What is the expression for the difference between five times a number and twice that number?
2 answers:
Answer:
Step-by-step explanation:
Let's call that number .
when we are asked for a difference we must substract quantities.
In this case we need the difference between five times a number (the number is represented by ) and twice that number:
five times the number x is equal to
twice that number x is equal to:
thus, the difference is:
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Answer:
Step-by-step explanation:
We require 2 equations with the repeating decimal after the decimal point in both equations.
The bar above 136 indicates that 136 is being repeated
let x = 0.136136...... → (1) Multiply both sides by 1000
1000x = 136.136.... → (2)
Subtract (1) from (2) to eliminate the decimal part
999x = 136 ( divide both sides by 999 )
x =