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Find the length of the leg `x`. Enter the exact value, not a decimal approximation.
[Graphs generated by this script: initPicture(-3,15.198684153571+3,-3,15.198684153571+3);path([[0,0],[5,0],[0,15.198684153571],[0,0]]);text([5/2,15.198684153571/2],'16','right');text([0,15.198684153571/2],'x','left');text([5/2,0],'5','below');]
`x =`
[Graphs generated by this script: initPicture(-3,15.198684153571+3,-3,15.198684153571+3);path([[0,0],[5,0],[0,15.198684153571],[0,0]]);text([5/2,15.198684153571/2],'16','right');text([0,15.198684153571/2],'x','left');text([5/2,0],'5','below');]
`x =`
Get help:
Box 1: Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity
Decimal values are not allowed