Decimals and Fractions Practice Test 4

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Question : 31 of 40

Marks: +1, -0

If

3.5x = 6.5y

, then the value of

({x-y}/{y+x})

is:

$3 /11$
0.3
0.2
$2 /11$
0.03

Solution:

3.5x = 6.5y⇒x={6.5y}/3.5={13y}/7

So,

({x-y}/{y+x})={{13y}/7-y}/{y+{13y}/7}

={13y-7y}/{7y+13y}=3/10=0.3

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