Question
If 21bx−28>49, Where b is a positive constant, which of the following best describes all possible values of 4 - 3bx?
Answer: Option A
:
A
Let examine the given inequality 21bx−28>49
Dividing both side by 7
21bx7−287>497
3bx−4>7
Multiply -1 on both side [remember to flip the sign]
−1(3bx−4)<7(−1)
4−3bx<−7
The correct answer is option A.
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:
A
Let examine the given inequality 21bx−28>49
Dividing both side by 7
21bx7−287>497
3bx−4>7
Multiply -1 on both side [remember to flip the sign]
−1(3bx−4)<7(−1)
4−3bx<−7
The correct answer is option A.
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