Unknown number 5

I think unknown number. If we enlarge it five times then subtract 3 and result decreases by 75% we get the number by one greater than the number I think. What number am I thinking?

Correct result:

x =  7

Solution:


(5x-3)•(1-75/100) = 1+x

(5•x-3)•(1-75/100) = 1+x

25x = 175

x = 7

Our simple equation calculator calculates it.



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