2.
If 2a = 3b = 7c = 5d = 210 then a + b + c + d is
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2a=3b=4c=5d=210
2a=210
a=210/2=105
3b=210
b=210/3=70
4c=210
c=210/4=52.5
5d=210
d=210/5=42
a+b+c+d=105+70+52.5+42
=269.5
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