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Find the values of a,b,c and d, if 3[{...

Find the values of a,b,c and d, if ` 3[{:(a,b),(c,d):}]=[{:(a,6),(-1,2d):}]+[{:(4,a+b),(c+d,3):}]`.

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we have,
`3[{:(a,b),(c,d):}]=[{:(a,6),(-1,2d):}]+[{:(4,a+b),(c+d,3):}]`
`rArr [{:(3a,3b),(3c,3d):}]=[{:(a+4, 6+a+b),(c+d-1,3+2d):}]`
`rArr 3a=a+4rArra=2`.
`3b=6+a+b`
`rArr 3b-b=8rArrb=4`
and `rArr 3c=c+d-1`
`rArr 3c=c+d-1`
`therefore 2c=3-1c=1`
`therefore a=2,b=4,c=1` and d=3
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