I tell you these facts about a mystery number, C:
2 answers:
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Answer:
Step-by-step explanation:
Add 2 to both sides:
Subtract 7x from both sides:
Divide both sides by -1:
Given- 90% of runner completed the marathon.
out of which 30% are man.
To proof - let the total number of runner be y.
the men completed the marathon be 30% of the 90%.
thus we have
30% of 90% of y = 270
×
×y = 270
now solving the above equation
we get
Thus solving the equation
y = 1000
Thus the total runners of men who completed marathon be 1000.
Hence proved