It is possible to expand an existing equation. The player may place tiles on one or both sides of an equation in a way that does not upset the balance of the equation; however, each equation is allowed only one equal symbol. For example, the fourth player might expand the existing equation 4 = 4, creating the new equation 7 + 9 x 4 = 43.
The new equation is valid because each side has the same value 43, and the equation has only one equal symbol. The score for this play is 11 points (2 + 1 + 2 + 3 + 1 + 0 + 1 + 1 = 11). The player draws five new tiles to replace those played.
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