a sum of 640 is distribute among three girls. a b,c b gets 70 more than a, c gets 80, than b
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a+70=b & c=80 the sum=640
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Answer:
b=a+70
c=b+80
a+b+c=640
a+(a+70)+(b+80)=640
a+(a+60)+(a+70+80)=640
3a+220=640
3a=420
a=140
b=210
c=290
Step-by-step explanation:
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