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15,75z=8,75z+43,75
7z=43,75
z=6,25
8,75/14=7/x
98=8,75x
x=11,2
8,75/y=8/7
8y=61,25
y=7,66
7y = 70
y = 10
10/14 = 8/x
10x = 112
x = 11,2
z/8,75 = (z+5)/15,75
8,75(z+5) = 15,75z
8,75z + 43,75 = 15,75z
43,75 = 15,75z - 8,75z
43,75 = 7z
z = 6,25