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If a + b = 15 and 2a – b = 6, what is the value of b ?
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22 Apr 2020, 13:17
22 Apr 2020, 13:17
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2% (00:00) wrong based on 36 sessions
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If \(a + b = 15\) and \(2a – b = 6\), what is the value of b ?
A. 6
B. 7
C. 8
D. 9
E. 10
A. 6
B. 7
C. 8
D. 9
E. 10
Re: If a + b = 15 and 2a – b = 6, what is the value of b ?
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23 Apr 2020, 01:01
23 Apr 2020, 01:01
1
a + b = 15, it can be written as:
2a+2b = 30.
2a-b = 6
On subtracting, we get 3b = 24. Thus, b = 8. Thus, C is the answer.
2a+2b = 30.
2a-b = 6
On subtracting, we get 3b = 24. Thus, b = 8. Thus, C is the answer.
Re: If a + b = 15 and 2a – b = 6, what is the value of b ?
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23 Apr 2020, 03:18
23 Apr 2020, 03:18
Ans choice c is right.
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