SOLUTION: if ratio of two numbers "a" and "b" is 3 to 4 and their sum is 420. Find a-b
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Question 479145: if ratio of two numbers "a" and "b" is 3 to 4 and their sum is 420. Find a-b
Answer by Tatiana_Stebko(1539) (Show Source): You can put this solution on YOUR website!
from the first equation substitute into the second equation
divide by 7
multiply by 4
substitute into ,
Then
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