If 7^2x+1 ÷ 49=343, find the value of x
Answers
Answered by
50
Step-by-step explanation:
7^(2x+1) = 7³×7²
7^(2x+1) = 7^5
2x + 1 = 5
2x = 4 , x = 2
Answered by
24
[7^ (2x+1) ]/49 = 343
=> [7^ (2x+1) ]/7² = 7³
=> 7^ (2x+1-2)= 7³
=> 7^(2x+-1)=7³
On comparing the powers on both sides
=> 2x -1 = 3
=> 2x = 4
=> x = 2
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