10% of X* is the complement of 40% of 2 X*. Find X.
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10% of x= x*10/100= x/10
40% of 2x= 2x*40/100= 4x/5
now,
x/10+4x/5=90
x+8x/10=90
9x/10=90
x=100
40% of 2x= 2x*40/100= 4x/5
now,
x/10+4x/5=90
x+8x/10=90
9x/10=90
x=100
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