ANSWER THE FOLLOWING: 1] The sum of three times a number and 15 is 42. Find the number. 2) Lakshmi thought of a number. She multiplied it by 2, added 5 to the product and obtained 17 as the result. What is the number she had thought of?
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STEP BY STEP EXPLANATION:
1] Let the no. be x
A·T·Q
=> 3x + 15 = 42
=> 3x = 42 - 15
=> 3x = 27
=> x = 27/3 = 9
Therefore, the no. is 9.
2] Let the no. be a
A·T·Q
=> a(2) + 5 = 17
=> 2a + 5 = 17
=> 2a = 17 - 5
=> 2a = 12
=> a = 12/2 = 6
Therefore, the no. she thought of was 6.
HOPE IT HELPS... ^_^
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