12 less than three times a number is equal to the number. What is the number?
alvairis1995:
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A train leaves Philadelphia at 5:00 PM. A second train leaves the same city in the same direction at 7:00 PM. The second train travels 30mph faster than the first. If the second train overtakes the first at 11:00 PM, what is the speed of each of the two trains?
A train leaves Philadelphia at 5:00 PM. A second train leaves the same city in the same direction at 7:00 PM. The second train travels 30mph faster than the first. If the second train overtakes the first at 11:00 PM, what is the speed of each of the two trains?
Answers
Answered by
1
3x=12
x=12/3
Therefore,
x=4
the answer is wrong
Answered by
3
-Let the number be 'X'.
-12 less than 3times a number=(3X-12)
:-Given- 12 less than 3 times a number is equal to the number.
3X-12=X
3X-X =12
2X =12
X =12÷2
X =6
For Confirmation:-
3×6-12=6
18-12 =6
6 =6
Hence proved the number formed is 6
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