Direction: what should come in place at question mark(?).

45% of 224×?% of 120=8104.32

If 3x + 7y=75, 5x- 5y= 25, then the value of (x +y)=?

The value of   $$ {(0.03)^2 - (0.01)^2}\over 0.03-0.01 $$

What is the value of X ?, if 7580 - X = 3440

$$ {4\over 5}×[{1\over 2}\ of\ 25]+12÷{3\over 4}-32=?$$

Direction : What value should come in the place of question mark (?) in the following questions?

125% of 2440 – 75% of 1856 = ?

If 551 ÷ 29 = 19 then 5.51 ÷ 0.0019 = ?

What is the value of $${0.74×1.23×0.13\over (0.37)^{3}+(0.41)^{3}-8(0.39)^{3}}$$ ?