63 and 84 are both divisible by 21 63/21=3 84/21=4 the reduced form would be 3/4
20+7.50h
h represents the amount of hours, which you would multiply by 7.50

7 hundreds, 4 tens and 9 units.
Answer:
x = 6, <em><u>PLEASE MARK AS BRAINLIEST</u></em>
Step-by-step explanation:
<em>Let this number be x: </em>
<em>1) Increase x by 30 = x + 30</em>
<em>2) Divide the result by 2 = </em>
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<em>3) The number obtained is 3 times the original number = </em>
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