Answers

2014-02-21T21:18:46+05:30
X/4=(x-21)
x=4(x-21)
x=4x - (21*4)
4x-x=21*4
3x=21*4
x=(21*4)/3
x=7*4(21 is cancelled by 3)
x=28
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2014-02-22T11:28:11+05:30
X=4(x-21)
x=4x-84
3x=84
so x=28
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