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[tex]\it 5=\dfrac{x}{a}=\dfrac{y}{b}=\dfrac{z}{c}=\dfrac{t}{d}=\dfrac{x+y+z+t}{a+b+c+d}=\dfrac{x+y+z+t}{110} \Rightarrow x+y+z+t=5\cdot110[/tex]