(70x10)+(6x1)+(4x1/10)+(2x1/100)+(9x1/1000)
Direct variation. Have a nice day!
Answer: 
Step-by-step explanation:
To solve this exercise you need to remember the following:
→ 
Therefore, keeping the above on mind, you can solve for x as following:


Remember that, by definition:
, then you have:

Subtract 6 from both sides of the equation.
Then the value of x is:

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