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Simplify -(2 x - 5 y ) + 3(4 x + 2 y ) and justify each step in your simplification
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\[-2x+5y+12x+6y\] distribution \[11y+10x\] combining like terms
-2x +5y + 12x + 6y. Multiplication by -1 & distributive prop. (-2x + 12x) + (5y +6y) assoc prop 10x + 11y simplified using addition
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