Question

7^x+2 - 14 * 7^x = 5

Answer 1

$7^x*7^2 - 14 * 7^x = 5; 49*7^x-14*7^x=5; 35*7^x=5; 7 * 7^x=1; 7^1*7^x=7^0; 1+x=0; x = -1.$