Look at the given equations and find the connection between them.
Once you figure out the logic behind the given equations you will be able to find the missing number in the last equation.
If
I – III + IV = 100
IV – VI + IX = 999
II – VI + VII = 879
Then;
III – III + VI = ?
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WE can solve the equation as given below;
I – III + IV = 100
II = 100 —–(1)
IV – VI + IX = 999
VII = 999 ——-(2)
II – VI + VII = 879
III = 879——–(3)
III – III + VI = VI
As per (1),(2),(3)
II + VII – III = 100 + 999 – 879
VI = 100 + 120 = 220
Ans: 220
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