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## Answers

d= 500-c

we knw tht,

d-b+c=495

so, 500-c -b+c =495

b=5

a+b=240

a=235

a-c=215

c=20

d=500-20

=480

D= 500-C

D-B+C=495

500-C -B+C =495[PUTTING THE VALUE OF D]

-B=495-500=-5

B=5

A+B=240[PUTTING THE VALUE OF B]

A+5=240

A=235.

A-C=215[PUTTING THE VALUE OF A]

235-C=215

-C=215-235=-20

C=20

C+D=500[PUTTING THE VALUE OF C]

20+D=500

D=500-20

D=480