On month -------- 10%
12 month ---------- x %
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x = 12*10/1 = 12*10 = 120%
An equation for those could be: x*y= t*y-10= 30 so x,y,t could be 6,5,8
The original price would be 190 because if you add 5 to 90 you get 95. 95 is half of the original price so you multiple 95 times 2 to get the original price.
