find the value of a,b,c,d in the matrices [d+3 8+a 3b-2 a_4] = 2 2a+1 b_5 4c]
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d+3=2 8+a=2a+1 3b-2=b-5 a-4=4c
solving them we get
a=7 b= -3/2 c=3/4 d= -1
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