b = Ah
divide both sides by A
b/A = h
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Not enough information to solve
(1) Add the two equations together & solve for A:A - B = 381A + B = 561-------------------2A + 0B = 9422A = 9422A/2 = 942/2A = 471(2) Now substitute A back into one of the original equations & solve for B:A + B = 561471 + B = 561B = 561 - 471B = 90
Without knowing where a, b and h are, we have no way of knowing whether ab and ah are lengths, widths or diagonals and consequently, no way of determining the area.
36 -20 = 16
It is not possible to solve a single linear equation in two unknown variables (b and t).