riley-murray_60c1e4db15fd3
riley-murray_60c1e4db15fd3
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X=12 + ( -1 +5)-( 2-7) x = 12 + 4 - (-5) x = 16 + 5 x = 21 Y= 2-( -1 -5 +8) +( 7-3) -4 y = 2 - (-6+8) + 4 - 4 y = 2 - 2 y = 0 x+y = 21