She has a $2370.00 budget for spending on two trips a and b. a’s currency is trading at $1.30 per currency a, and country b’s currency is trading at $1.40 per currency b. she plans to spend more in country a, so she wants to have five times as much of currency a as currency b. set up and solve a system of equations to model this problem and explain what the answer means in practical terms. complete the equation that represents the total cost of purchasing currency. let x be the number of currency a and y the currency b.