[tex]A \ certain \ sum \ of \ money \ is :\ x \\\\Ana: \ 5x\\ Bert: \ 7x \\ Dan: \ 3x \\\\ If \ Dan \ Gets \ 45 \ pesos .\\\\3x=45 \ \ | \ divide \ both \ sides\ by\ 3 \\ \\x=15 \ pesos \\ \\ Ana: \ 5 \cdot 15 =75 \ pesos\\ Bert: \ 7 \cdot 15=105 \ pesos \\ Dan: \ 45 \ pesos \\\\Total : \\\\75+105+45= 225 \ pesos \\\\Answer: \ The \ total \ amount \ is \ 225 \ pesos . [/tex]