Question

Find x $7^{77}+7^{77}+7^{77}+7^{77}+7^{77}+7^{77}+7^{77}=7^{x}$

Answer 1

Step-by-step explanation:

7^77 + 7^77 + 7^77 + 7^77 + 7^77 + 7^77 + 7^77 = 7^x

: (7^77)(1+1+1+1+1+1+1) = 7^x

: (7^77)(7) = 7^x

: x = 77+1 (Equating the power's)

: x = 78

Hence, x = 78

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