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Q22: In a certain city, the cost
Q29: Find <span class="ql-formula" data-value="h (
Q75: <span class="ql-formula" data-value="\left\{ \begin{array} { r }
Q89: If the cost, <span class="ql-formula"
Q108: Find the amount of a 11% saline
Q115: <span class="ql-formula" data-value="7 a - 2 a
Q115: A vendor sells hot dogs, bags of
Q130: <span class="ql-formula" data-value="( - 2 ) ^
Q151: Nine times the sum of a number
Q203: <span class="ql-formula" data-value="\frac { v } {