A rational number is such that when u multiply it by 5/2 and add 2/3 to the product u get -7/12. What is the number?
kvnmurty:
X * 5/2 = [ -7 -8 ] / 12 ;;; X * 5/2 = -15/12 = -5/4 ;;;; X = -5/4 * 2/5 = -1 / 2
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Answered by
705
Hi,
Let the rational number = x
x is multiplued with 5/2 = 5x / 2
According to the problem given,
5x/2 + 2/3 = - 7/12
5x/2 = -7/12 - 2/3
5x/2 = ( -7 - 8 ) / 12
5x / 2 = -15 / 12
x = ( - 15 / 12 ) × ( 2 / 5 )
x = - 30 / 60
x = - 1 / 2
Therefore,
Required rational number = x = - 1/2
I hope this helps you.
:)
Let the rational number = x
x is multiplued with 5/2 = 5x / 2
According to the problem given,
5x/2 + 2/3 = - 7/12
5x/2 = -7/12 - 2/3
5x/2 = ( -7 - 8 ) / 12
5x / 2 = -15 / 12
x = ( - 15 / 12 ) × ( 2 / 5 )
x = - 30 / 60
x = - 1 / 2
Therefore,
Required rational number = x = - 1/2
I hope this helps you.
:)
Answered by
242
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