30 + 30 - 30 = 30

50 + 50 + 30 = 130

50 - 10 - 30 = 10

30 + 50 x 5 = 280 (multiply first and then add)

I think the solution is 280

400

280

If helmet + helmet - helmet = 30, then 30 + 30 - 30 = 30, so helmet = 30

If quiver + quiver + helmet = 130, then 50 + 50 + 30 = 130, so quiver = 50

If quiver - double axe - helmet = 10, then 50 - 10 - 30 = 10, so double axe = 10

Therefore helmet + quiver x single axe = ?

If double axe = 10, then single axe = 5

30 + 50 x 5 

30 + 250

280

Rpta = 280

If helmet + helmet - helmet = 30, then 30 + 30 - 30 = 30, so helmet = 30

If quiver (with 5 arrows) + quiver (with 5 arrows) + helmet = 130, then 50 + 50 + 30 = 130, so quiver (with 5 arrows) = 50

If quiver (with 5 arrows) - double axe - helmet = 10, then 50 - 10 - 30 = 10, so double axe = 10

Therefore helmet + quiver (with 4 arrows) x single axe = ?

If double axe = 10, then single axe = 5

If quiver (with 5 arrows) = 50, then quiver (with 4 arrows) = 40

30 + 40 x 5 = 230, so ? = 230

High Andrew,

The multiface God   said to a girl the answer is :

280