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...Mathematics date day solving equations unit investigating a balance the golden rule of algebra do unto one side equation what you to other an is like scale if we put something on or take off unbalanced when math must always keep balanced so that both sides are equal some pictorial examples how many marbles in each pouch example page lesson can solve these same problems algebraically let x represent and marble will have value explore trickier later with exception all two step more difficult demonstrate negative values use patterns from positive practice w b y c m d e k f p g h i j l mike currently years older than his sister janet sum their ages following represents this scenario where s age old n triangle has perimeter cm three lengths answers complete textbook ad cd bc bd cde...