Subtract the sum of (-2a+3b+4c) and (-5a - ab -6c) from the sum of (-9a +6b) and (-2a+4b+5 )
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if 2a+3b+4c+5d2a-3b-4c-5d=2a-3b+4c- 5d2a-3b-4c+5d, then show that a,3b,2c and 5d are in proportion. ... Subtract the sum of 2a+3b,a-2b+c,- a ... Simplifique a expresso: A) (-2a -3b)- (2a - 3b).
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