17. If twice a number is decreased by 13, the result is 9. What is the number?
A 10 B. 11 C. 12
18. Seven less than twice a number is 15. What is the number
A. 11 B. 12 C. 13 D. 14.
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A 10 B. 11 C. 12
18. Seven less than twice a number is 15. What is the number
A. 11 B. 12 C. 13 D. 14.
Pa help po
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17. B
18. A
Solution:
17.
2n - 13 = 9
2n = 9 + 13
2n = 22
2n/2 = 22/2
n = 11
18.
2n - 7 = 15
2n = 15 + 7
2n = 22
2n/2 = 22/2
n = 11