find the values in box
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rk13463:
Is it 13 or 18
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Let, nos be w,x,y,z in boxes
Then, w+x=8---------I
w+y=13----------------II
x+z=8--------------------III
y-z=6---------------------IV
adding III AND IV,
x+y=14
subtracting III and I
y-x=5
adding these,
2y=19
y=9.5
x+9.5=14
x=4.5
4.5+z=8
z=3.5
w+4.5=8
w=3.5
Then, w+x=8---------I
w+y=13----------------II
x+z=8--------------------III
y-z=6---------------------IV
adding III AND IV,
x+y=14
subtracting III and I
y-x=5
adding these,
2y=19
y=9.5
x+9.5=14
x=4.5
4.5+z=8
z=3.5
w+4.5=8
w=3.5
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