(11) Anna and Xinyi had an equal amount of money ot first. After Anna spent \( \$ 245 \) and Xinyl spent \( \$ 74 \), Xinyi had 4 times as muc money as Anna. How much money did each girl have at first?
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Let the amount of money Anna and Xinyi had initially be \( x \). After spending, Anna has: \( x - 245 \) Xinyi has: \( x - 74 \) According to the problem, after spending, Xinyi has 4 times the amount of Anna: \[ x - 74 = 4(x - 245) \] Now, let's solve for \( x \): \[ x - 74 = 4x - 980 \] \[ -74 + 980 = 4x - x \] \[ 906 = 3x \] \[ x = 302 \] So, both Anna and Xinyi had \( \$ 302 \) at first. Just to double-check: After Anna spent \( \$ 245 \), she had \( 302 - 245 = 57 \). After Xinyi spent \( \$ 74 \), she had \( 302 - 74 = 228 \). Indeed, \( 228 \) is \( 4 \times 57 \), so both figures check out!