What number should be added to 3/7 to get 5/4 ?
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1
Answer:
Step-by-step explanation:3+x/7+x = 5/4
4 is multiplied to 3+x we get 12 + 4x
5 is multiplied to 7+x we get 35+5x
12 + 4x = 35 + 5x
12 - 35 = 5x - 4x
-23=x (ans)
Answered by
1
Let the required number be x
(3/7) – x = (5/4)
– x = (5/4) – (3/7)
The LCM of 4 and 7 is 28
Consider (5/4) = (5/4) × (7/7) = (35/28)
Again (3/7) = (3/7) × (4/4) = (12/28)
On substituting -x = (35/28) – (12/28) – x = (35 -12)/28
– x = (23/28)
x = (-23/28)
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